Sionvs Jax
Sion vs Jax is a decisive matchup in LoL patch 26.19. Sion wins with a 59.0% win rate (+17.9%) over Jax based on 39 games. Sion holds the advantage in both the early and late game. Below you'll find the best Sion build, runes, laning stats, and strategies for the Sion vs Jax matchup.
Sion Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Sion 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 Sion vs Jax?
Sion wins 51.3% of these games. With this many games the true rate is most likely between 40.4% and 62.1% (95% range).
- Expected
- 50.0% From both champions' overall Top win rates
- Matchup effect
- +1.3 pts Observed minus expected
- Sample
- 78 games Lane: Top
- vs patch 26.18
- +7.9 pts Within normal patch-to-patch noise
Lane: Top · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
Key takeaways
- Sion vs Jax is an even matchup: Sion wins 51.3% of 78 games, and the 95% range (40.4–62.1%) comfortably includes 50%.
- Both champions' overall Top win rates predict 50.0% for Sion; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Sion usually wins the lane: 426 gold ahead of Jax at 15 minutes on average (76 games with a 15-minute snapshot).
- Sion players pick Approach Velocity far more often against Jax: 46.8% of their other Top games, 60.3% 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 Sion 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 Sion'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.
Sion vs Jax Laning Stats
At 15 minutes
Whole-game averages
Sion vs Jax Win Rate by Game Length
Sion'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: Sion's results against Jax in short and long games are within the margin of error of each other.
Sion 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)SionSion gold at 15: +426
- First itemSionSion: 12.6 min · Jax: 13.3 min
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesEvenSion wins 47.8% of 46 games
What Sion Changes Against Jax
Choices Sion players make noticeably more or less often in this matchup than in their other Top games.
Usually46.8%vs Jax60.3%+13.5 pts48.9% WR here
InspirationSecondary treeUsually51.0%vs Jax64.1%+13.2 pts46.0% WR here
Titanic HydraItemUsually25.0%vs Jax37.2%+12.2 pts58.6% WR here
Shield BashRuneUsually9.7%vs Jax17.9%+8.2 pts
Frozen HeartItemUsually4.5%vs Jax11.5%+7.1 pts
Health (defense)Stat shardUsually6.7%vs Jax12.8%+6.1 pts
Teleport + IgniteSummoner spellsUsually0.5%vs Jax5.1%+4.7 pts
Best Sion Build vs Jax
Usual Sion build (Top)
68.5% win rate · 54 games
Against Jax
Not enough matchup-specific build data: only 6 of 56 Sion games against Jax carried a complete build, which is too few to recommend an item path from. Use Sion's standard build instead.
- Sion usually completes Heartsteel first, at 12.6 min (median of 43 games).
- Jax usually completes Trinity Force first, at 13.3 min (median of 50 games).
- Skill priority: Q > W > 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 Sion Runes vs Jax
Usual Sion runes (Top)
Grasp of the Undying
56.4% win rate · 156 games
Against Jax
Grasp of the Undying46.4% win rate · 28 games
Plan your Sion 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
Sion matchup data for League of Legends patch 26.19. The table below shows Sion'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 Sion build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Sion Matchups
Hardest for Sion
Easiest for Sion
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.
Sion vs Jax FAQ - Patch 26.19
Who wins Sion vs Jax?
Sion vs Jax is an even matchup: Sion wins 51.3% of 78 games, and the 95% range (40.4–62.1%) comfortably includes 50%.
What is Sion's win rate against Jax?
Sion wins 51.3% of 78 Top games against Jax on patch 26.19 (95% range 40.4–62.1%). Based on both champions' overall Top win rates, 50.0% would be expected.
Does Sion counter Jax?
Not clearly. Sion wins 51.3% of 78 games against Jax, and the 95% range (40.4–62.1%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Sion or Jax?
Sion usually wins the lane: 426 gold ahead of Jax at 15 minutes on average (76 games with a 15-minute snapshot).
Does Sion outscale Jax?
There are too few games of each length to tell yet.
When is Jax strongest against Sion?
On current data there is no stage of the game where Jax is ahead of Sion beyond the margin of error.
What should Sion build against Jax?
There are not enough games for a matchup-specific core, so use Sion's usual Top core: Titanic Hydra, Heartsteel, Unending Despair. The biggest change against Jax: Titanic Hydra (25.0% usually, 37.2% here).
What runes should Sion use against Jax?
Grasp of the Undying with Resolve and Inspiration — 46.4% over 28 games against Jax. The biggest change against Jax: Approach Velocity (46.8% usually, 60.3% here).