This will vary because unlike other stat sites we include 100% of a brackets champions played and never include champions that don't belong in the bracket.
Emerald+ Champions Analysed: 55,987,592
We include 100% of the champions played of every selected tier bracket in our analysis, we never include champions from outside the tier quoted tier.
Rammus Counters
Rammus jungle vs middle Counters
Rammus jungle on Patch 30 is the strongest counter to middle champions of Ezreal, Lucian & Kog'Maw. While Rammus jungle is countered most by middle champions of Nasus, Mordekaiser & Zilean. Below is a detailed breakdown of Rammus jungle counters against middle champions with a minimum of 100 games.
Nasus
the Curator of the Sands
Rammus wins against Nasus 42.86% of the time which is 4.31% lower against Nasus than the average opponent.
After normalising both champions win rates Rammus wins against Nasus 9.16% less often than would be expected.
The average opponent winrate against Nasusis 47.17%.
Mordekaiser
the Iron Revenant
Rammus wins against Mordekaiser 44.12% of the time which is 3.66% lower against Mordekaiser than the average opponent.
After normalising both champions win rates Rammus wins against Mordekaiser 8.51% less often than would be expected.
The average opponent winrate against Mordekaiseris 47.78%.
Zilean
the Chronokeeper
Rammus wins against Zilean 44.31% of the time which is 1.72% lower against Zilean than the average opponent.
After normalising both champions win rates Rammus wins against Zilean 6.57% less often than would be expected.
The average opponent winrate against Zileanis 46.03%.
Sion
The Undead Juggernaut
Rammus wins against Sion 44.67% of the time which is 4.35% lower against Sion than the average opponent.
After normalising both champions win rates Rammus wins against Sion 9.20% less often than would be expected.
The average opponent winrate against Sionis 49.02%.
Swain
the Noxian Grand General
Rammus wins against Swain 46.15% of the time which is 0.60% lower against Swain than the average opponent.
After normalising both champions win rates Rammus wins against Swain 5.45% less often than would be expected.
The average opponent winrate against Swainis 46.75%.
Anivia
the Cryophoenix
Rammus wins against Anivia 46.61% of the time which is 0.15% higher against Anivia than the average opponent.
After normalising both champions win rates Rammus wins against Anivia 4.70% less often than would be expected.
The average opponent winrate against Aniviais 46.46%.
Nunu & Willump
the Boy and His Yeti
Rammus wins against Nunu & Willump 47.24% of the time which is 3.25% lower against Nunu & Willump than the average opponent.
After normalising both champions win rates Rammus wins against Nunu & Willump 8.10% less often than would be expected.
The average opponent winrate against Nunu & Willumpis 50.49%.
Galio
the Colossus
Rammus wins against Galio 47.57% of the time which is 1.00% higher against Galio than the average opponent.
After normalising both champions win rates Rammus wins against Galio 3.85% less often than would be expected.
The average opponent winrate against Galiois 46.57%.
Zac
the Secret Weapon
Rammus wins against Zac 47.71% of the time which is 2.03% higher against Zac than the average opponent.
After normalising both champions win rates Rammus wins against Zac 2.81% less often than would be expected.
The average opponent winrate against Zacis 45.68%.
Brand
the Burning Vengeance
Rammus wins against Brand 47.90% of the time which is 1.97% higher against Brand than the average opponent.
After normalising both champions win rates Rammus wins against Brand 2.88% less often than would be expected.
The average opponent winrate against Brandis 45.93%.
Cassiopeia
the Serpent's Embrace
Rammus wins against Cassiopeia 48.65% of the time which is 1.98% higher against Cassiopeia than the average opponent.
After normalising both champions win rates Rammus wins against Cassiopeia 2.87% less often than would be expected.
The average opponent winrate against Cassiopeiais 46.67%.
Morgana
the Fallen
Rammus wins against Morgana 49.19% of the time which is 1.85% higher against Morgana than the average opponent.
After normalising both champions win rates Rammus wins against Morgana 3.00% less often than would be expected.
The average opponent winrate against Morganais 47.34%.
Neeko
the Curious Chameleon
Rammus wins against Neeko 49.34% of the time which is 1.99% higher against Neeko than the average opponent.
After normalising both champions win rates Rammus wins against Neeko 2.86% less often than would be expected.
The average opponent winrate against Neekois 47.35%.
Vel'Koz
the Eye of the Void
Rammus wins against Vel'Koz 49.41% of the time which is 1.60% higher against Vel'Koz than the average opponent.
After normalising both champions win rates Rammus wins against Vel'Koz 3.25% less often than would be expected.
The average opponent winrate against Vel'Kozis 47.81%.
Annie
the Dark Child
Rammus wins against Annie 49.71% of the time which is 3.09% higher against Annie than the average opponent.
After normalising both champions win rates Rammus wins against Annie 1.76% less often than would be expected.
The average opponent winrate against Annieis 46.62%.
Garen
The Might of Demacia
Rammus wins against Garen 49.82% of the time which is 3.38% higher against Garen than the average opponent.
After normalising both champions win rates Rammus wins against Garen 1.47% less often than would be expected.
The average opponent winrate against Garenis 46.44%.
Aurelion Sol
The Star Forger
Rammus wins against Aurelion Sol 50.60% of the time which is 1.55% higher against Aurelion Sol than the average opponent.
After normalising both champions win rates Rammus wins against Aurelion Sol 3.30% less often than would be expected.
The average opponent winrate against Aurelion Solis 49.05%.
Kassadin
the Void Walker
Rammus wins against Kassadin 50.62% of the time which is 2.28% higher against Kassadin than the average opponent.
After normalising both champions win rates Rammus wins against Kassadin 2.57% less often than would be expected.
The average opponent winrate against Kassadinis 48.34%.
Xerath
the Magus Ascendant
Rammus wins against Xerath 50.89% of the time which is 3.02% higher against Xerath than the average opponent.
After normalising both champions win rates Rammus wins against Xerath 1.83% less often than would be expected.
The average opponent winrate against Xerathis 47.87%.
Viktor
the Machine Herald
Rammus wins against Viktor 50.97% of the time which is 3.04% higher against Viktor than the average opponent.
After normalising both champions win rates Rammus wins against Viktor 1.81% less often than would be expected.
The average opponent winrate against Viktoris 47.93%.
Akali
the Rogue Assassin
Rammus wins against Akali 51.45% of the time which is 3.32% higher against Akali than the average opponent.
After normalising both champions win rates Rammus wins against Akali 1.53% less often than would be expected.
The average opponent winrate against Akaliis 48.13%.
Karma
the Enlightened One
Rammus wins against Karma 51.54% of the time which is 1.15% higher against Karma than the average opponent.
After normalising both champions win rates Rammus wins against Karma 3.70% less often than would be expected.
The average opponent winrate against Karmais 50.39%.
Hwei
the Visionary
Rammus wins against Hwei 51.57% of the time which is 2.66% higher against Hwei than the average opponent.
After normalising both champions win rates Rammus wins against Hwei 2.19% less often than would be expected.
The average opponent winrate against Hweiis 48.91%.
Rumble
the Mechanized Menace
Rammus wins against Rumble 51.62% of the time which is 4.78% higher against Rumble than the average opponent.
After normalising both champions win rates Rammus wins against Rumble 0.07% less often than would be expected.
The average opponent winrate against Rumbleis 46.84%.
Ahri
the Nine-Tailed Fox
Rammus wins against Ahri 51.87% of the time which is 3.94% higher against Ahri than the average opponent.
After normalising both champions win rates Rammus wins against Ahri 0.91% less often than would be expected.
The average opponent winrate against Ahriis 47.93%.
Kayle
the Righteous
Rammus wins against Kayle 51.92% of the time which is 5.63% higher against Kayle than the average opponent.
After normalising both champions win rates Rammus wins against Kayle 0.78% more often than would be expected.
The average opponent winrate against Kayleis 46.29%.
Ryze
the Rune Mage
Rammus wins against Ryze 51.97% of the time which is 2.78% higher against Ryze than the average opponent.
After normalising both champions win rates Rammus wins against Ryze 2.07% less often than would be expected.
The average opponent winrate against Ryzeis 49.19%.
Syndra
the Dark Sovereign
Rammus wins against Syndra 51.98% of the time which is 3.30% higher against Syndra than the average opponent.
After normalising both champions win rates Rammus wins against Syndra 1.55% less often than would be expected.
The average opponent winrate against Syndrais 48.68%.
Sett
the Boss
Rammus wins against Sett 52.00% of the time which is 7.06% higher against Sett than the average opponent.
After normalising both champions win rates Rammus wins against Sett 2.22% more often than would be expected.
The average opponent winrate against Settis 44.94%.
Sylas
the Unshackled
Rammus wins against Sylas 52.13% of the time which is 4.53% higher against Sylas than the average opponent.
After normalising both champions win rates Rammus wins against Sylas 0.32% less often than would be expected.
The average opponent winrate against Sylasis 47.60%.
Lux
the Lady of Luminosity
Rammus wins against Lux 52.16% of the time which is 4.71% higher against Lux than the average opponent.
After normalising both champions win rates Rammus wins against Lux 0.14% less often than would be expected.
The average opponent winrate against Luxis 47.45%.
Ekko
the Boy Who Shattered Time
Rammus wins against Ekko 52.21% of the time which is 4.86% higher against Ekko than the average opponent.
After normalising both champions win rates Rammus wins against Ekko 0.01% more often than would be expected.
The average opponent winrate against Ekkois 47.35%.
Twisted Fate
the Card Master
Rammus wins against Twisted Fate 52.25% of the time which is 5.36% higher against Twisted Fate than the average opponent.
After normalising both champions win rates Rammus wins against Twisted Fate 0.51% more often than would be expected.
The average opponent winrate against Twisted Fateis 46.89%.
Vex
the Gloomist
Rammus wins against Vex 52.30% of the time which is 6.29% higher against Vex than the average opponent.
After normalising both champions win rates Rammus wins against Vex 1.44% more often than would be expected.
The average opponent winrate against Vexis 46.01%.
Vladimir
the Crimson Reaper
Rammus wins against Vladimir 52.30% of the time which is 3.50% higher against Vladimir than the average opponent.
After normalising both champions win rates Rammus wins against Vladimir 1.35% less often than would be expected.
The average opponent winrate against Vladimiris 48.80%.
Fizz
the Tidal Trickster
Rammus wins against Fizz 52.33% of the time which is 4.49% higher against Fizz than the average opponent.
After normalising both champions win rates Rammus wins against Fizz 0.36% less often than would be expected.
The average opponent winrate against Fizzis 47.84%.
Kennen
the Heart of the Tempest
Rammus wins against Kennen 52.65% of the time which is 6.96% higher against Kennen than the average opponent.
After normalising both champions win rates Rammus wins against Kennen 2.12% more often than would be expected.
The average opponent winrate against Kennenis 45.69%.
Cho'Gath
the Terror of the Void
Rammus wins against Cho'Gath 52.76% of the time which is 3.64% higher against Cho'Gath than the average opponent.
After normalising both champions win rates Rammus wins against Cho'Gath 1.21% less often than would be expected.
The average opponent winrate against Cho'Gathis 49.12%.
Taliyah
the Stoneweaver
Rammus wins against Taliyah 52.79% of the time which is 4.81% higher against Taliyah than the average opponent.
After normalising both champions win rates Rammus wins against Taliyah 0.04% less often than would be expected.
The average opponent winrate against Taliyahis 47.98%.
Briar
the Restrained Hunger
Rammus wins against Briar 52.88% of the time which is 4.54% higher against Briar than the average opponent.
After normalising both champions win rates Rammus wins against Briar 0.31% less often than would be expected.
The average opponent winrate against Briaris 48.34%.
Veigar
the Tiny Master of Evil
Rammus wins against Veigar 53.12% of the time which is 5.79% higher against Veigar than the average opponent.
After normalising both champions win rates Rammus wins against Veigar 0.94% more often than would be expected.
The average opponent winrate against Veigaris 47.33%.
Malzahar
the Prophet of the Void
Rammus wins against Malzahar 53.19% of the time which is 4.88% higher against Malzahar than the average opponent.
After normalising both champions win rates Rammus wins against Malzahar 0.03% more often than would be expected.
The average opponent winrate against Malzaharis 48.31%.
Renekton
the Butcher of the Sands
Rammus wins against Renekton 53.27% of the time which is 6.16% higher against Renekton than the average opponent.
After normalising both champions win rates Rammus wins against Renekton 1.31% more often than would be expected.
The average opponent winrate against Renektonis 47.11%.
Lissandra
the Ice Witch
Rammus wins against Lissandra 53.48% of the time which is 4.04% higher against Lissandra than the average opponent.
After normalising both champions win rates Rammus wins against Lissandra 0.81% less often than would be expected.
The average opponent winrate against Lissandrais 49.44%.
Gragas
the Rabble Rouser
Rammus wins against Gragas 53.50% of the time which is 6.50% higher against Gragas than the average opponent.
After normalising both champions win rates Rammus wins against Gragas 1.65% more often than would be expected.
The average opponent winrate against Gragasis 47.00%.
Aatrox
the Darkin Blade
Rammus wins against Aatrox 53.52% of the time which is 4.36% higher against Aatrox than the average opponent.
After normalising both champions win rates Rammus wins against Aatrox 0.49% less often than would be expected.
The average opponent winrate against Aatroxis 49.16%.
LeBlanc
the Deceiver
Rammus wins against LeBlanc 53.54% of the time which is 3.54% higher against LeBlanc than the average opponent.
After normalising both champions win rates Rammus wins against LeBlanc 1.31% less often than would be expected.
The average opponent winrate against LeBlancis 50.00%.
Akshan
the Rogue Sentinel
Rammus wins against Akshan 53.62% of the time which is 7.63% higher against Akshan than the average opponent.
After normalising both champions win rates Rammus wins against Akshan 2.78% more often than would be expected.
The average opponent winrate against Akshanis 45.99%.
Talon
the Blade's Shadow
Rammus wins against Talon 53.64% of the time which is 5.13% higher against Talon than the average opponent.
After normalising both champions win rates Rammus wins against Talon 0.28% more often than would be expected.
The average opponent winrate against Talonis 48.51%.
Diana
Scorn of the Moon
Rammus wins against Diana 53.81% of the time which is 6.42% higher against Diana than the average opponent.
After normalising both champions win rates Rammus wins against Diana 1.57% more often than would be expected.
The average opponent winrate against Dianais 47.39%.
Naafiri
the Hound of a Hundred Bites
Rammus wins against Naafiri 53.82% of the time which is 5.47% higher against Naafiri than the average opponent.
After normalising both champions win rates Rammus wins against Naafiri 0.62% more often than would be expected.
The average opponent winrate against Naafiriis 48.35%.
Heimerdinger
the Revered Inventor
Rammus wins against Heimerdinger 54.12% of the time which is 8.30% higher against Heimerdinger than the average opponent.
After normalising both champions win rates Rammus wins against Heimerdinger 3.45% more often than would be expected.
The average opponent winrate against Heimerdingeris 45.82%.
Shen
the Eye of Twilight
Rammus wins against Shen 54.15% of the time which is 8.37% higher against Shen than the average opponent.
After normalising both champions win rates Rammus wins against Shen 3.53% more often than would be expected.
The average opponent winrate against Shenis 45.78%.
Lee Sin
the Blind Monk
Rammus wins against Lee Sin 54.39% of the time which is 3.16% higher against Lee Sin than the average opponent.
After normalising both champions win rates Rammus wins against Lee Sin 1.68% less often than would be expected.
The average opponent winrate against Lee Sinis 51.23%.
Twitch
the Plague Rat
Rammus wins against Twitch 54.43% of the time which is 5.16% higher against Twitch than the average opponent.
After normalising both champions win rates Rammus wins against Twitch 0.31% more often than would be expected.
The average opponent winrate against Twitchis 49.27%.
Pantheon
the Unbreakable Spear
Rammus wins against Pantheon 54.45% of the time which is 6.49% higher against Pantheon than the average opponent.
After normalising both champions win rates Rammus wins against Pantheon 1.64% more often than would be expected.
The average opponent winrate against Pantheonis 47.96%.
Tryndamere
the Barbarian King
Rammus wins against Tryndamere 54.50% of the time which is 10.44% higher against Tryndamere than the average opponent.
After normalising both champions win rates Rammus wins against Tryndamere 5.61% more often than would be expected.
The average opponent winrate against Tryndamereis 44.06%.
K'Sante
the Pride of Nazumah
Rammus wins against K'Sante 54.55% of the time which is 1.06% higher against K'Sante than the average opponent.
After normalising both champions win rates Rammus wins against K'Sante 3.76% less often than would be expected.
The average opponent winrate against K'Santeis 53.49%.
Jayce
the Defender of Tomorrow
Rammus wins against Jayce 54.85% of the time which is 4.59% higher against Jayce than the average opponent.
After normalising both champions win rates Rammus wins against Jayce 0.26% less often than would be expected.
The average opponent winrate against Jayceis 50.26%.
Irelia
the Blade Dancer
Rammus wins against Irelia 54.90% of the time which is 6.99% higher against Irelia than the average opponent.
After normalising both champions win rates Rammus wins against Irelia 2.14% more often than would be expected.
The average opponent winrate against Ireliais 47.91%.
Malphite
Shard of the Monolith
Rammus wins against Malphite 55.01% of the time which is 5.94% higher against Malphite than the average opponent.
After normalising both champions win rates Rammus wins against Malphite 1.09% more often than would be expected.
The average opponent winrate against Malphiteis 49.07%.
Qiyana
Empress of the Elements
Rammus wins against Qiyana 55.09% of the time which is 6.72% higher against Qiyana than the average opponent.
After normalising both champions win rates Rammus wins against Qiyana 1.87% more often than would be expected.
The average opponent winrate against Qiyanais 48.37%.
Tristana
the Yordle Gunner
Rammus wins against Tristana 55.31% of the time which is 6.48% higher against Tristana than the average opponent.
After normalising both champions win rates Rammus wins against Tristana 1.63% more often than would be expected.
The average opponent winrate against Tristanais 48.83%.
Zed
the Master of Shadows
Rammus wins against Zed 55.34% of the time which is 6.09% higher against Zed than the average opponent.
After normalising both champions win rates Rammus wins against Zed 1.24% more often than would be expected.
The average opponent winrate against Zedis 49.25%.
Kled
the Cantankerous Cavalier
Rammus wins against Kled 55.34% of the time which is 10.94% higher against Kled than the average opponent.
After normalising both champions win rates Rammus wins against Kled 6.11% more often than would be expected.
The average opponent winrate against Kledis 44.40%.
Ziggs
the Hexplosives Expert
Rammus wins against Ziggs 55.53% of the time which is 6.15% higher against Ziggs than the average opponent.
After normalising both champions win rates Rammus wins against Ziggs 1.30% more often than would be expected.
The average opponent winrate against Ziggsis 49.38%.
Jhin
the Virtuoso
Rammus wins against Jhin 55.56% of the time which is 6.08% higher against Jhin than the average opponent.
After normalising both champions win rates Rammus wins against Jhin 1.23% more often than would be expected.
The average opponent winrate against Jhinis 49.48%.
Orianna
the Lady of Clockwork
Rammus wins against Orianna 55.57% of the time which is 5.21% higher against Orianna than the average opponent.
After normalising both champions win rates Rammus wins against Orianna 0.36% more often than would be expected.
The average opponent winrate against Oriannais 50.36%.
Katarina
the Sinister Blade
Rammus wins against Katarina 55.92% of the time which is 7.36% higher against Katarina than the average opponent.
After normalising both champions win rates Rammus wins against Katarina 2.51% more often than would be expected.
The average opponent winrate against Katarinais 48.56%.
Seraphine
the Starry-Eyed Songstress
Rammus wins against Seraphine 56.04% of the time which is 7.20% higher against Seraphine than the average opponent.
After normalising both champions win rates Rammus wins against Seraphine 2.35% more often than would be expected.
The average opponent winrate against Seraphineis 48.84%.
Azir
the Emperor of the Sands
Rammus wins against Azir 56.05% of the time which is 3.17% higher against Azir than the average opponent.
After normalising both champions win rates Rammus wins against Azir 1.66% less often than would be expected.
The average opponent winrate against Aziris 52.88%.
Quinn
Demacia's Wings
Rammus wins against Quinn 56.19% of the time which is 10.05% higher against Quinn than the average opponent.
After normalising both champions win rates Rammus wins against Quinn 5.20% more often than would be expected.
The average opponent winrate against Quinnis 46.14%.
Karthus
the Deathsinger
Rammus wins against Karthus 56.30% of the time which is 6.38% higher against Karthus than the average opponent.
After normalising both champions win rates Rammus wins against Karthus 1.53% more often than would be expected.
The average opponent winrate against Karthusis 49.92%.
Zoe
the Aspect of Twilight
Rammus wins against Zoe 56.75% of the time which is 8.49% higher against Zoe than the average opponent.
After normalising both champions win rates Rammus wins against Zoe 3.64% more often than would be expected.
The average opponent winrate against Zoeis 48.26%.
Kai'Sa
Daughter of the Void
Rammus wins against Kai'Sa 56.93% of the time which is 4.60% higher against Kai'Sa than the average opponent.
After normalising both champions win rates Rammus wins against Kai'Sa 0.23% less often than would be expected.
The average opponent winrate against Kai'Sais 52.33%.
Gangplank
the Saltwater Scourge
Rammus wins against Gangplank 57.21% of the time which is 6.97% higher against Gangplank than the average opponent.
After normalising both champions win rates Rammus wins against Gangplank 2.12% more often than would be expected.
The average opponent winrate against Gangplankis 50.24%.
Corki
the Daring Bombardier
Rammus wins against Corki 57.52% of the time which is 4.85% higher against Corki than the average opponent.
After normalising both champions win rates Rammus wins against Corki 0.02% more often than would be expected.
The average opponent winrate against Corkiis 52.67%.
Viego
The Ruined King
Rammus wins against Viego 57.93% of the time which is 8.18% higher against Viego than the average opponent.
After normalising both champions win rates Rammus wins against Viego 3.33% more often than would be expected.
The average opponent winrate against Viegois 49.75%.
Yone
the Unforgotten
Rammus wins against Yone 58.05% of the time which is 7.42% higher against Yone than the average opponent.
After normalising both champions win rates Rammus wins against Yone 2.57% more often than would be expected.
The average opponent winrate against Yoneis 50.63%.
Caitlyn
the Sheriff of Piltover
Rammus wins against Caitlyn 58.26% of the time which is 5.26% higher against Caitlyn than the average opponent.
After normalising both champions win rates Rammus wins against Caitlyn 0.44% more often than would be expected.
The average opponent winrate against Caitlynis 53.00%.
Graves
the Outlaw
Rammus wins against Graves 58.43% of the time which is 7.22% higher against Graves than the average opponent.
After normalising both champions win rates Rammus wins against Graves 2.38% more often than would be expected.
The average opponent winrate against Gravesis 51.21%.
Vayne
the Night Hunter
Rammus wins against Vayne 58.45% of the time which is 8.52% higher against Vayne than the average opponent.
After normalising both champions win rates Rammus wins against Vayne 3.67% more often than would be expected.
The average opponent winrate against Vayneis 49.93%.
Smolder
the Fiery Fledgling
Rammus wins against Smolder 59.09% of the time which is 5.49% higher against Smolder than the average opponent.
After normalising both champions win rates Rammus wins against Smolder 0.67% more often than would be expected.
The average opponent winrate against Smolderis 53.60%.
Yasuo
the Unforgiven
Rammus wins against Yasuo 59.63% of the time which is 9.48% higher against Yasuo than the average opponent.
After normalising both champions win rates Rammus wins against Yasuo 4.63% more often than would be expected.
The average opponent winrate against Yasuois 50.15%.
Master Yi
the Wuju Bladesman
Rammus wins against Master Yi 59.84% of the time which is 9.33% higher against Master Yi than the average opponent.
After normalising both champions win rates Rammus wins against Master Yi 4.48% more often than would be expected.
The average opponent winrate against Master Yiis 50.51%.
Varus
the Arrow of Retribution
Rammus wins against Varus 61.15% of the time which is 7.50% higher against Varus than the average opponent.
After normalising both champions win rates Rammus wins against Varus 2.68% more often than would be expected.
The average opponent winrate against Varusis 53.65%.
Kog'Maw
the Mouth of the Abyss
Rammus wins against Kog'Maw 62.57% of the time which is 13.99% higher against Kog'Maw than the average opponent.
After normalising both champions win rates Rammus wins against Kog'Maw 9.14% more often than would be expected.
The average opponent winrate against Kog'Mawis 48.58%.
Lucian
the Purifier
Rammus wins against Lucian 63.51% of the time which is 10.73% higher against Lucian than the average opponent.
After normalising both champions win rates Rammus wins against Lucian 5.90% more often than would be expected.
The average opponent winrate against Lucianis 52.78%.
Ezreal
the Prodigal Explorer
Rammus wins against Ezreal 68.54% of the time which is 12.33% higher against Ezreal than the average opponent.
After normalising both champions win rates Rammus wins against Ezreal 7.56% more often than would be expected.
The average opponent winrate against Ezrealis 56.21%.