Amumuvs Jarvan IV
Amumu vs Jarvan IV is a decisive matchup in LoL patch 26.19. Amumu wins with a 56.3% win rate (+12.5%) over Jarvan IV based on 32 games. Amumu holds the advantage in both the early and late game. Below you'll find the best Amumu build, runes, laning stats, and strategies for the Amumu vs Jarvan IV matchup.
Amumu Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Amumu 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 Amumu vs Jarvan IV?
Amumu wins 51.7% of these games. With this many games the true rate is most likely between 39.2% and 64.1% (95% range).
- Expected
- 52.5% From both champions' overall Jungle win rates
- Matchup effect
- −0.8 pts Observed minus expected
- Sample
- 58 games Lane: Jungle
- vs patch 26.18
- +3.2 pts Within normal patch-to-patch noise
Lane: Jungle · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
Key takeaways
- Current data slightly favors Amumu, but the sample is too limited for a strong conclusion: Amumu wins 51.7% of 58 games (95% range 39.2–64.1%).
- Both champions' overall Jungle win rates predict 52.5% for Amumu; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Neither side reliably wins the lane: the average gold difference at 15 minutes is 218, within the margin of error (56 games).
- Amumu players pick the Q > E > W skill order far more often against Jarvan IV: under 0.5% of their other Jungle games, 3.4% 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 Amumu and Jarvan IV 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 Amumu'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.
Amumu vs Jarvan IV Laning Stats
At 15 minutes
Whole-game averages
Amumu vs Jarvan IV Win Rate by Game Length
Amumu's win rate against Jarvan IV 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: Amumu's results against Jarvan IV in short and long games are within the margin of error of each other.
Amumu vs Jarvan IV 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)EvenAmumu gold at 15: −218
- First itemEvenAmumu: 0.2 min · Jarvan IV: 0.2 min
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Amumu Changes Against Jarvan IV
Choices Amumu players make noticeably more or less often in this matchup than in their other Jungle games.
- Q > E > Wthe Q > E > W skill orderSkill priorityUsuallyunder 0.5%vs Jarvan IV3.4%+3.4 pts
Best Amumu Build vs Jarvan IV
Usual Amumu build (Jungle)
70.0% win rate · 50 games
Against Jarvan IV
Not enough matchup-specific build data: only 11 of 40 Amumu games against Jarvan IV carried a complete build, which is too few to recommend an item path from. Use Amumu's standard build instead.
- Amumu usually completes Mosstomper Seedling first, at 0.2 min (median of 44 games).
- Jarvan IV usually completes Scorchclaw Pup first, at 0.2 min (median of 36 games).
- Skill priority: E > Q > 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 Amumu Runes vs Jarvan IV
Usual Amumu runes (Jungle)
Conqueror
54.1% win rate · 1,798 games
Against Jarvan IV
Conqueror64.0% win rate · 25 games
Plan your Amumu 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
Amumu matchup data for League of Legends patch 26.19. The table below shows Amumu'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 Amumu build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Amumu Matchups
Hardest for Amumu
Easiest for Amumu
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.
Amumu vs Jarvan IV FAQ - Patch 26.19
Who wins Amumu vs Jarvan IV?
Current data slightly favors Amumu, but the sample is too limited for a strong conclusion: Amumu wins 51.7% of 58 games (95% range 39.2–64.1%).
What is Amumu's win rate against Jarvan IV?
Amumu wins 51.7% of 58 Jungle games against Jarvan IV on patch 26.19 (95% range 39.2–64.1%). Based on both champions' overall Jungle win rates, 52.5% would be expected.
Does Amumu counter Jarvan IV?
Not clearly. Amumu wins 51.7% of 58 games against Jarvan IV, and the 95% range (39.2–64.1%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Amumu or Jarvan IV?
Neither side reliably wins the lane: the average gold difference at 15 minutes is 218, within the margin of error (56 games).
Does Amumu outscale Jarvan IV?
There are too few games of each length to tell yet.
When is Jarvan IV strongest against Amumu?
On current data there is no stage of the game where Jarvan IV is ahead of Amumu beyond the margin of error.
What should Amumu build against Jarvan IV?
There are not enough games for a matchup-specific core, so use Amumu's usual Jungle core: Abyssal Mask, Liandry's Torment, Frozen Heart.
What runes should Amumu use against Jarvan IV?
Conqueror with Precision and Domination — 64.0% over 25 games against Jarvan IV.