- Win Rate
- 52.1%
- Pick Rate
- 1.3%
- Ban Rate
- 8.7%
Rammus vs Master Yi
- Patch
- 26.21
- Games
- 2,658
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Nov 3, 2026 UTC
- Author
- Dakota Chinnick
- Methodology
- Data Methodology
Rammus vs Master Yi is a decisive matchup in LoL patch 26.21. Rammus wins with a 56.7% win rate (+13.4%) over Master Yi based on 231 games. Rammus holds the advantage in both the early and late game. Below you'll find the best Rammus build, runes, laning stats, and strategies for the Rammus vs Master Yi matchup.
Rammus Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Rammus performs against them. You'll get head-to-head win rates, laning stats, the best build and runes for the matchup, and early vs late game analysis — all based on real ranked data.
Who wins Rammus vs Master Yi?
Rammus wins 56.8% of these games. With this many games the true rate is most likely between 50.2% and 63.2% (95% range).
- Expected
- 52.3% From both champions' overall Jungle win rates
- Matchup effect
- +4.6 pts Observed minus expected
- Sample
- 220 games Lane: Jungle
- vs patch 26.20
- +1.4 pts Within normal patch-to-patch noise
Lane: Jungle · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.21 · Oct 27 – Nov 3
Key takeaways
- Rammus is favored in this matchup: Rammus wins 56.8% of 220 games, and the whole 95% range (50.2–63.2%) is on the same side of 50%.
- Both champions' overall Jungle win rates predict 52.3% for Rammus; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Master Yi usually wins the lane: 409 gold ahead of Rammus at 15 minutes on average (220 games with a 15-minute snapshot).
- Rammus players pick Plated Steelcaps far more often against Master Yi: 59.8% of their other Jungle games, 70.5% here.
How we calculate this
Games: ranked Solo/Duo and Flex games on the North America server from the patch shown. Remakes (games under 5 minutes) are excluded.
A game only counts when Rammus and Master Yi played the same position on opposite teams, so roaming, lane swaps within a team or a champion merely being in the same game never count as this matchup.
The 95% range is a Wilson score interval. Confidence comes from how wide that range is: within ±3 points is very high, ±5 high, ±8 moderate, anything wider low. Below 20 games a matchup is not classified at all.
Expected win rate combines both champions’ win rates in this lane (same games and filters) with the log5 formula: E = A(1−B) / (A(1−B) + B(1−A)). Matchup effect = observed − expected.
"What changes" compares Rammus's choices in this matchup with the same champion's other games in the same lane, and lists a change only when it is at least 3 points and statistically significant (two-proportion z-test, |z| ≥ 2, 20+ games).
Results are not split by rank: the sample per rank is too small for honest per-rank matchup numbers.
Rammus vs Master Yi Laning Stats
At 15 minutes
Whole-game averages
Rammus vs Master Yi Win Rate by Game Length
Rammus's win rate against Master Yi by game length. The dot is the win rate, the bar its 95% range and the dashed line the champion's usual win rate at that length. Lengths with fewer than 25 games are left blank.
No game length stands out: Rammus's results against Master Yi in short and long games are within the margin of error of each other.
Rammus vs Master Yi Power Spikes
Who is ahead at each stage, measured from these games. A stage reads "Even" when the difference is inside the margin of error, and "Insufficient data" when there are too few games to tell.
- Lane (15 min)Master YiRammus gold at 15: −409
- First itemEvenRammus: 0.2 min · Master Yi: 0.2 min
- Games under 20 minInsufficient data
- 20–30 min gamesEvenRammus wins 51.1% of 88 games
- 30+ min gamesRammusRammus wins 60.2% of 118 games
What Rammus Changes Against Master Yi
Choices Rammus players make noticeably more or less often in this matchup than in their other Jungle games.
Plated SteelcapsBootsUsually59.8%vs Master Yi70.5%+10.7 pts60.6% WR here
Sunfire AegisItemUsually46.0%vs Master Yi56.4%+10.3 pts62.1% WR here
Randuin's OmenItemUsually14.5%vs Master Yi24.5%+10.1 pts59.3% WR here
Hollow RadianceItemUsually18.6%vs Master Yi8.6%−9.9 pts
Mosstomper Seedling + Health Potion + Stealth WardStarting itemsUsually18.6%vs Master Yi28.2%+9.6 pts53.2% WR here
Mercury's TreadsBootsUsually27.7%vs Master Yi20.0%−7.7 pts56.8% WR here
Gustwalker Hatchling + Health Potion + Stealth WardStarting itemsUsually22.8%vs Master Yi15.9%−6.9 pts62.9% WR here
Best Rammus Build vs Master Yi
Usual Rammus build (Jungle)
71.4% win rate · 42 games
Against Master Yi
76.2% win rate · 21 games
Limited sample: 21 of 152 games finished this exact core, so treat it as an observation rather than a recommendation.
- Rammus usually completes Mosstomper Seedling first, at 0.2 min (median of 117 games).
- Master Yi usually completes Gustwalker Hatchling first, at 0.2 min (median of 88 games).
- Skill priority: Q > E > W — the same as usual.
Builds are ranked by the lower edge of their win rate range, not the raw win rate, so a build seen in a handful of wins never outranks a proven one.
Best Rammus Runes vs Master Yi
Usual Rammus runes (Jungle)
Aftershock
55.6% win rate · 934 games
Against Master Yi
Aftershock60.9% win rate · 87 games
Plan your Rammus draft in Draft Lab
Draft Lab lays out both teams lane by lane with live matchup win rates, damage profiles and game-phase lean, and suggests picks and bans from current meta data.
- Full 5v5 draft board
- Lane matchup win rates
- Pick and ban suggestions
Rammus matchup data for League of Legends patch 26.21. The table below shows Rammus's win rate, gold difference, and performance stats against every champion in the current meta. Click any champion name to see a detailed head-to-head breakdown including the best Rammus build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Rammus Matchups
Hardest for Rammus
Easiest for Rammus
Win rate and games for each matchup. Lists are ranked by the edge of the 95% range so small samples cannot top them; matchups with at least 50 games only.
Help us maintain accuracy! If you notice incorrect stats, missing data, or any issues, your feedback directly improves the quality of our data for the entire community.
Rammus vs Master Yi FAQ - Patch 26.21
Who wins Rammus vs Master Yi?
Rammus is favored in this matchup: Rammus wins 56.8% of 220 games, and the whole 95% range (50.2–63.2%) is on the same side of 50%.
What is Rammus's win rate against Master Yi?
Rammus wins 56.8% of 220 Jungle games against Master Yi on patch 26.21 (95% range 50.2–63.2%). Based on both champions' overall Jungle win rates, 52.3% would be expected.
Does Rammus counter Master Yi?
Yes. Rammus wins 56.8% of 220 games against Master Yi on patch 26.21, and the whole 95% range is above 50%.
Who wins lane, Rammus or Master Yi?
Master Yi usually wins the lane: 409 gold ahead of Rammus at 15 minutes on average (220 games with a 15-minute snapshot).
Does Rammus outscale Master Yi?
Not measurably: Rammus's win rate against Master Yi in games of 25 minutes or less and in longer games is within the margin of error of each other.
When is Master Yi strongest against Rammus?
Master Yi is measurably ahead in: Lane (15 min).
What should Rammus build against Master Yi?
The most successful Rammus core against Master Yi is Jak'Sho, The Protean, Dead Man's Plate, Thornmail (76.2% over 21 games). The biggest change against Master Yi: Plated Steelcaps (59.8% usually, 70.5% here).
What runes should Rammus use against Master Yi?
Aftershock with Resolve and Sorcery — 60.9% over 87 games against Master Yi.