- Win Rate
- 49.8%
- Pick Rate
- 2.0%
- Ban Rate
- 4.0%
Dr. Mundo vs Jax
- Patch
- 26.20
- Games
- 4,055
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Oct 20, 2026 UTC
- Methodology
- Data Methodology
- Author
- Dakota Chinnick
Dr. Mundo vs Jax is a decisive matchup in LoL patch 26.20. Dr. Mundo wins with a 52.6% win rate (+5.2%) over Jax based on 97 games. Dr. Mundo wins the early laning phase while Jax scales better into the late game. Below you'll find the best Dr. Mundo build, runes, laning stats, and strategies for the Dr. Mundo vs Jax matchup.
Dr. Mundo Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Dr. Mundo 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 Dr. Mundo vs Jax?
Dr. Mundo wins 52.3% of these games. With this many games the true rate is most likely between 41.9% and 62.6% (95% range).
- Expected
- 50.6% From both champions' overall Top win rates
- Matchup effect
- +1.8 pts Observed minus expected
- Sample
- 86 games Lane: Top
- vs patch 26.19
- −3.7 pts Within normal patch-to-patch noise
Lane: Top · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.20 · Oct 9 – Oct 19
They also met in another lane (Jungle): 7 games, Dr. Mundo won 71.4%.
Key takeaways
- Current data slightly favors Dr. Mundo, but the sample is too limited for a strong conclusion: Dr. Mundo wins 52.3% of 86 games (95% range 41.9–62.6%).
- Both champions' overall Top win rates predict 50.6% for Dr. Mundo; 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 145, within the margin of error (83 games).
- Dr. Mundo players pick Doran's Helm + Health Potion far more often against Jax: 16.5% of their other Top games, 26.7% 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 Dr. Mundo and Jax 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 Dr. Mundo'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.
Dr. Mundo vs Jax Laning Stats
At 15 minutes
Whole-game averages
Dr. Mundo vs Jax Win Rate by Game Length
Dr. Mundo's win rate against Jax 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: Dr. Mundo's results against Jax in short and long games are within the margin of error of each other.
Dr. Mundo vs Jax 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)EvenDr. Mundo gold at 15: −145
- First itemDr. MundoDr. Mundo: 12.1 min · Jax: 13.4 min
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesEvenDr. Mundo wins 44.9% of 49 games
What Dr. Mundo Changes Against Jax
Choices Dr. Mundo players make noticeably more or less often in this matchup than in their other Top games.
Doran's Helm + Health PotionStarting itemsUsually16.5%vs Jax26.7%+10.2 pts52.2% WR here
Mercury's TreadsBootsUsually13.2%vs Jax5.8%−7.4 pts- E > Q > Wthe E > Q > W skill orderSkill priorityUsually6.9%vs Jax1.2%−5.7 pts
Best Dr. Mundo Build vs Jax
Usual Dr. Mundo build (Top)
62.2% win rate · 577 games
Against Jax
Not enough matchup-specific build data: only 12 of 54 Dr. Mundo games against Jax carried a complete build, which is too few to recommend an item path from. Use Dr. Mundo's standard build instead.
- Dr. Mundo usually completes Heartsteel first, at 12.1 min (median of 52 games).
- Jax usually completes Trinity Force first, at 13.4 min (median of 43 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 Dr. Mundo Runes vs Jax
Usual Dr. Mundo runes (Top)
Grasp of the Undying
62.2% win rate · 74 games
Against Jax
Grasp of the Undying
58.1% win rate · 31 games
Plan your Dr. Mundo 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
Dr. Mundo matchup data for League of Legends patch 26.20. The table below shows Dr. Mundo'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 Dr. Mundo build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Dr. Mundo Matchups
Hardest for Dr. Mundo
Easiest for Dr. Mundo
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.
Dr. Mundo vs Jax FAQ - Patch 26.20
Who wins Dr. Mundo vs Jax?
Current data slightly favors Dr. Mundo, but the sample is too limited for a strong conclusion: Dr. Mundo wins 52.3% of 86 games (95% range 41.9–62.6%).
What is Dr. Mundo's win rate against Jax?
Dr. Mundo wins 52.3% of 86 Top games against Jax on patch 26.20 (95% range 41.9–62.6%). Based on both champions' overall Top win rates, 50.6% would be expected.
Does Dr. Mundo counter Jax?
Not clearly. Dr. Mundo wins 52.3% of 86 games against Jax, and the 95% range (41.9–62.6%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Dr. Mundo or Jax?
Neither side reliably wins the lane: the average gold difference at 15 minutes is 145, within the margin of error (83 games).
Does Dr. Mundo outscale Jax?
There are too few games of each length to tell yet.
When is Jax strongest against Dr. Mundo?
On current data there is no stage of the game where Jax is ahead of Dr. Mundo beyond the margin of error.
What should Dr. Mundo build against Jax?
There are not enough games for a matchup-specific core, so use Dr. Mundo's usual Top core: Titanic Hydra, Heartsteel, Warmog's Armor. The biggest change against Jax: Doran's Helm + Health Potion (16.5% usually, 26.7% here).
What runes should Dr. Mundo use against Jax?
Grasp of the Undying with Resolve and Inspiration — 58.1% over 31 games against Jax.