- Win Rate
- 47.6%
- Pick Rate
- 4.5%
- Ban Rate
- 9.2%
Jayce vs Sion
- Patch
- 26.22
- Games
- 8,897
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Nov 14, 2026 UTC
- Author
- Dakota Chinnick
- Methodology
- Data Methodology
Jayce vs Sion (Top): Jayce wins 40.7% of 194 ranked games over the last 2 patches (gold diff at 15: +150). Patch 26.22 build & runes.
Jayce40.7%
Sion is favored in this matchup: Jayce wins 40.7% of 194 games, and the whole 95% range (34.1–47.8%) is on the same side of 50%.
Jayce Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Jayce 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 Jayce vs Sion?
Jayce wins 40.7% of these games. With this many games the true rate is most likely between 34.1% and 47.8% (95% range).
- Expected
- 46.3% From both champions' overall Top win rates
- Matchup effect
- −5.6 pts Observed minus expected
- Sample
- 194 games Lane: Top · Patch 26.21–26.22
- vs patch 26.21
- — Not enough games on both patches
Lane: Top · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.21–26.22 · Oct 27 – Nov 14
The headline win rate covers patches 26.21–26.22 (194 games). The lane, game-length, build and rune sections below use patch 26.22 only (163 games).
They also met in another lane (Jungle): 11 games, Jayce won 63.6%.
Key takeaways
- Sion is favored in this matchup: Jayce wins 40.7% of 194 games, and the whole 95% range (34.1–47.8%) is on the same side of 50%.
- Both champions' overall Top win rates predict 46.3% for Jayce; 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 150, within the margin of error (159 games).
- Jayce players pick Demolish far more often against Sion: 29.3% of their other Top games, 65.6% 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 Jayce and Sion 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 Jayce'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.
Jayce vs Sion Laning Stats
At 15 minutes
Whole-game averages
Jayce vs Sion Win Rate by Game Length
Jayce's win rate against Sion 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: Jayce's results against Sion in short and long games are within the margin of error of each other.
Jayce vs Sion 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)EvenJayce gold at 15: +150
- First itemJayceJayce: 10.9 min · Sion: 13.0 min
- Games under 20 minInsufficient data
- 20–30 min gamesEvenJayce wins 45.7% of 70 games
- 30+ min gamesEvenJayce wins 38.1% of 63 games
What Jayce Changes Against Sion
Choices Jayce players make noticeably more or less often in this matchup than in their other Top games.
DemolishRuneUsually29.3%vs Sion65.6%+36.3 pts44.9% WR here
Grasp of the UndyingKeystoneUsually27.9%vs Sion63.2%+35.3 pts44.7% WR here
Stormraider's SurgeKeystoneUsually49.0%vs Sion14.7%−34.3 pts45.8% WR here
Usually63.8%vs Sion31.9%−31.9 pts30.8% WR here
OvergrowthRuneUsually26.2%vs Sion57.1%+30.9 pts46.2% WR here
Manaflow BandRuneUsually46.1%vs Sion16.0%−30.2 pts42.3% WR here
Serpent's FangItemUsually19.4%vs Sion45.4%+26.0 pts41.9% WR here
Flash + TeleportSummoner spellsUsually56.9%vs Sion81.6%+24.7 pts42.1% WR here
Best Jayce Build vs Sion
Usual Jayce build (Top)
90.9% win rate · 11 games
Against Sion
Not enough matchup-specific build data: only 8 of 96 Jayce games against Sion carried a complete build, which is too few to recommend an item path from. Use Jayce's standard build instead.
- Jayce usually completes Youmuu's Ghostblade first, at 10.9 min (median of 44 games).
- Sion usually completes Unending Despair first, at 13.0 min (median of 52 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 Jayce Runes vs Sion
Usual Jayce runes (Top)
Stormraider's Surge
74.3% win rate · 35 games
Against Sion
Grasp of the Undying
47.6% win rate · 21 games
Plan your Jayce 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
Jayce matchup data for League of Legends patch 26.22. The table below shows Jayce'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 Jayce build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Jayce Matchups
Hardest for Jayce
Easiest for Jayce
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.
Jayce vs Sion FAQ - Patch 26.21–26.22
Who wins Jayce vs Sion?
Sion is favored in this matchup: Jayce wins 40.7% of 194 games, and the whole 95% range (34.1–47.8%) is on the same side of 50%.
What is Jayce's win rate against Sion?
Jayce wins 40.7% of 194 Top games against Sion on patch 26.21–26.22 (95% range 34.1–47.8%). Based on both champions' overall Top win rates, 46.3% would be expected.
Does Jayce counter Sion?
No — it is the other way around: Jayce wins only 40.7% of 194 games against Sion, and the whole 95% range is below 50%.
Who wins lane, Jayce or Sion?
Neither side reliably wins the lane: the average gold difference at 15 minutes is 150, within the margin of error (159 games).
Does Jayce outscale Sion?
Not measurably: Jayce's win rate against Sion in games of 25 minutes or less and in longer games is within the margin of error of each other.
When is Sion strongest against Jayce?
On current data there is no stage of the game where Sion is ahead of Jayce beyond the margin of error.
What should Jayce build against Sion?
There are not enough games for a matchup-specific core, so use Jayce's usual Top core: Voltaic Cyclosword, Serpent's Fang, Maw of Malmortius. The biggest change against Sion: Youmuu's Ghostblade (63.8% usually, 31.9% here).
What runes should Jayce use against Sion?
Grasp of the Undying with Resolve and Inspiration — 47.6% over 21 games against Sion. The biggest change against Sion: Demolish (29.3% usually, 65.6% here).