- Win Rate
- 50.3%
- Pick Rate
- 1.5%
- Ban Rate
- 2.4%
Olaf vs Amumu
- Patch
- 26.20
- Games
- 1,145
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Oct 11, 2026 UTC
- Methodology
- Data Methodology
- Author
- Dakota Chinnick
Olaf vs Amumu is a decisive matchup in LoL patch 26.20. Amumu wins with a 58.3% win rate (+16.7%) over Olaf based on 12 games. Amumu wins the early laning phase while Olaf scales better into the late game. Below you'll find the best Olaf build, runes, laning stats, and strategies for the Olaf vs Amumu matchup.
Olaf Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Olaf 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 Olaf vs Amumu?
Olaf wins 41.7% of these games. With this many games the true rate is most likely between 19.3% and 68.0% (95% range).
- Expected
- 50.1% From both champions' overall Jungle win rates
- Matchup effect
- −8.5 pts Observed minus expected
- Sample
- 12 games Lane: Jungle
- vs patch 26.19
- — Not enough games on both patches
Lane: Jungle · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.20 · Oct 10
Key takeaways
- Only 12 Olaf vs Amumu games were recorded in the Jungle role on patch 26.20 — too few to say who is favored. Treat the numbers below as provisional.
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 Olaf and Amumu 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 Olaf'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.
Olaf vs Amumu Laning Stats
Only 12 games have a 15-minute snapshot so far — the lane-phase numbers appear from 30.
Whole-game averages
Olaf vs Amumu Win Rate by Game Length
Olaf's win rate against Amumu 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: Olaf's results against Amumu in short and long games are within the margin of error of each other.
Olaf vs Amumu 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)Insufficient data
- First itemInsufficient data
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Olaf Changes Against Amumu
Only 12 games so far — too few to compare what Olaf players do in this matchup with their usual choices (needs 20).
Best Olaf Build vs Amumu
Usual Olaf build (Jungle)
60.5% win rate · 43 games
Against Amumu
Not enough matchup-specific build data: only 0 of 12 Olaf games against Amumu carried a complete build, which is too few to recommend an item path from. Use Olaf's standard build instead.
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 Olaf Runes vs Amumu
Usual Olaf runes (Jungle)
Conqueror
55.3% win rate · 94 games
Against Amumu
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Olaf 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
Olaf matchup data for League of Legends patch 26.20. The table below shows Olaf'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 Olaf build, runes, laning stats, and early vs late game analysis for that specific matchup.
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.
Olaf vs Amumu FAQ - Patch 26.20
Who wins Olaf vs Amumu?
Only 12 Olaf vs Amumu games were recorded in the Jungle role on patch 26.20 — too few to say who is favored. Treat the numbers below as provisional.
What is Olaf's win rate against Amumu?
Olaf wins 41.7% of 12 Jungle games against Amumu on patch 26.20 (95% range 19.3–68.0%). Based on both champions' overall Jungle win rates, 50.1% would be expected.
Does Olaf counter Amumu?
There are only 12 Olaf vs Amumu games in this lane on patch 26.20 — too few to answer reliably yet.
Who wins lane, Olaf or Amumu?
There are not enough games with a 15-minute snapshot yet (12) to say who wins lane.
Does Olaf outscale Amumu?
There are too few games of each length to tell yet.
When is Amumu strongest against Olaf?
On current data there is no stage of the game where Amumu is ahead of Olaf beyond the margin of error.
What should Olaf build against Amumu?
There are not enough games for a matchup-specific core, so use Olaf's usual Jungle core: Stridebreaker, Death's Dance, Experimental Hexplate.
What runes should Olaf use against Amumu?
Use Olaf's usual Conqueror page (Precision + Inspiration); there are too few games for a matchup-specific page.