- Win Rate
- 51.4%
- Pick Rate
- 1.6%
- Ban Rate
- 0.3%
Sejuani vs Amumu
- Patch
- 26.19
- Games
- 3,249
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Oct 10, 2026 UTC
- Methodology
- Data Methodology
- Author
- Dakota Chinnick
Sejuani vs Amumu is a decisive matchup in LoL patch 26.19. Amumu wins with a 65.4% win rate (+30.8%) over Sejuani based on 26 games. Amumu holds the advantage in both the early and late game. Below you'll find the best Sejuani build, runes, laning stats, and strategies for the Sejuani vs Amumu matchup.
Sejuani Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Sejuani 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 Sejuani vs Amumu?
Sejuani wins 33.3% of these games. With this many games the true rate is most likely between 21.4% and 47.9% (95% range).
- Expected
- 49.4% From both champions' overall Jungle win rates
- Matchup effect
- −16.0 pts Observed minus expected
- Sample
- 45 games Lane: Jungle
- vs patch 26.18
- — Not enough games on both patches
Lane: Jungle · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
Key takeaways
- Amumu is favored in this matchup: Sejuani wins 33.3% of 45 games, and the whole 95% range (21.4–47.9%) is on the same side of 50%.
- That is 16.0 points worse for Sejuani than both champions' overall Jungle win rates predict (49.4%), so the matchup itself works against this pick.
- Neither side reliably wins the lane: the average gold difference at 15 minutes is 167, within the margin of error (43 games).
- Sejuani players pick Mercury's Treads far more often against Amumu: 39.3% of their other Jungle games, 57.8% 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 Sejuani 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 Sejuani'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.
Sejuani vs Amumu Laning Stats
At 15 minutes
Whole-game averages
Sejuani vs Amumu Win Rate by Game Length
Sejuani'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: Sejuani's results against Amumu in short and long games are within the margin of error of each other.
Sejuani 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)EvenSejuani gold at 15: −167
- First itemEvenSejuani: 0.2 min · Amumu: 0.2 min
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Sejuani Changes Against Amumu
Choices Sejuani players make noticeably more or less often in this matchup than in their other Jungle games.
Mercury's TreadsBootsUsually39.3%vs Amumu57.8%+18.5 pts34.6% WR here
Plated SteelcapsBootsUsually53.1%vs Amumu35.6%−17.6 pts
Mosstomper Seedling + Health Potion + Stealth WardStarting itemsUsually31.9%vs Amumu46.7%+14.8 pts19.0% WR here
ConditioningRuneUsually89.8%vs Amumu75.6%−14.3 pts29.4% WR here
Font of LifeRuneUsually90.3%vs Amumu77.8%−12.5 pts28.6% WR here
AftershockKeystoneUsually90.7%vs Amumu80.0%−10.7 pts27.8% WR here
OvergrowthRuneUsually90.0%vs Amumu80.0%−10.0 pts27.8% WR here
Stormraider's SurgeKeystoneUsually6.3%vs Amumu15.6%+9.3 pts
Best Sejuani Build vs Amumu
Usual Sejuani build (Jungle)
79.3% win rate · 29 games
Against Amumu
Not enough matchup-specific build data: only 2 of 24 Sejuani games against Amumu carried a complete build, which is too few to recommend an item path from. Use Sejuani's standard build instead.
- Sejuani usually completes Mosstomper Seedling first, at 0.2 min (median of 35 games).
- Amumu usually completes Mosstomper Seedling first, at 0.2 min (median of 31 games).
- Skill priority: W > Q > E — 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 Sejuani Runes vs Amumu
Usual Sejuani runes (Jungle)
Aftershock
55.1% win rate · 376 games
Against Amumu
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Sejuani 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
Sejuani matchup data for League of Legends patch 26.19. The table below shows Sejuani'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 Sejuani build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Sejuani Matchups
Hardest for Sejuani
Easiest for Sejuani
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.
Sejuani vs Amumu FAQ - Patch 26.19
Who wins Sejuani vs Amumu?
Amumu is favored in this matchup: Sejuani wins 33.3% of 45 games, and the whole 95% range (21.4–47.9%) is on the same side of 50%.
What is Sejuani's win rate against Amumu?
Sejuani wins 33.3% of 45 Jungle games against Amumu on patch 26.19 (95% range 21.4–47.9%). Based on both champions' overall Jungle win rates, 49.4% would be expected.
Does Sejuani counter Amumu?
No — it is the other way around: Sejuani wins only 33.3% of 45 games against Amumu, and the whole 95% range is below 50%.
Who wins lane, Sejuani or Amumu?
Neither side reliably wins the lane: the average gold difference at 15 minutes is 167, within the margin of error (43 games).
Does Sejuani outscale Amumu?
There are too few games of each length to tell yet.
When is Amumu strongest against Sejuani?
On current data there is no stage of the game where Amumu is ahead of Sejuani beyond the margin of error.
What should Sejuani build against Amumu?
There are not enough games for a matchup-specific core, so use Sejuani's usual Jungle core: Hollow Radiance, Heartsteel, Thornmail. The biggest change against Amumu: Mercury's Treads (39.3% usually, 57.8% here).
What runes should Sejuani use against Amumu?
Use Sejuani's usual Aftershock page (Resolve + Precision); there are too few games for a matchup-specific page. The biggest change against Amumu: Conditioning (89.8% usually, 75.6% here).