- Win Rate
- 48.5%
- Pick Rate
- 1.3%
- Ban Rate
- 2.1%
Kassadin vs Jayce
- Patch
- 26.22
- Games
- 2,446
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Nov 14, 2026 UTC
- Author
- Dakota Chinnick
- Methodology
- Data Methodology
Kassadin vs Jayce (Mid): Kassadin wins 50.0% of 24 ranked games over the last 2 patches. Matchup build, runes and lane stats for patch 26.22.
Kassadin50.0%
Kassadin vs Jayce is an even matchup: Kassadin wins 50.0% of 24 games, and the 95% range (31.4–68.6%) comfortably includes 50%.
Kassadin Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Kassadin 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 Kassadin vs Jayce?
Kassadin wins 50.0% of these games. With this many games the true rate is most likely between 31.4% and 68.6% (95% range).
- Expected
- 49.7% From both champions' overall Mid win rates
- Matchup effect
- +0.3 pts Observed minus expected
- Sample
- 24 games Lane: Mid · Patch 26.21–26.22
- vs patch 26.21
- — Not enough games on both patches
Lane: Mid · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.21–26.22 · Oct 28 – Nov 14
The headline win rate covers patches 26.21–26.22 (24 games). The lane, game-length, build and rune sections below use patch 26.22 only (19 games).
They also met in another lane (Top): 4 games, Kassadin won 50.0%.
Key takeaways
- Kassadin vs Jayce is an even matchup: Kassadin wins 50.0% of 24 games, and the 95% range (31.4–68.6%) comfortably includes 50%.
- Both champions' overall Mid win rates predict 49.7% for Kassadin; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
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 Kassadin and Jayce 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 Kassadin'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.
Kassadin vs Jayce Laning Stats
Only 19 games have a 15-minute snapshot so far — the lane-phase numbers appear from 30.
Whole-game averages
Kassadin vs Jayce Win Rate by Game Length
Kassadin's win rate against Jayce 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: Kassadin's results against Jayce in short and long games are within the margin of error of each other.
Kassadin vs Jayce 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)Insufficient data
- First itemInsufficient data
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Kassadin Changes Against Jayce
Only 19 games so far — too few to compare what Kassadin players do in this matchup with their usual choices (needs 20).
Best Kassadin Build vs Jayce
Usual Kassadin build (Mid)
90.7% win rate · 43 games
Against Jayce
Not enough matchup-specific build data: only 0 of 19 Kassadin games against Jayce carried a complete build, which is too few to recommend an item path from. Use Kassadin's standard build instead.
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 Kassadin Runes vs Jayce
Usual Kassadin runes (Mid)
Stormraider's Surge
66.7% win rate · 48 games
Against Jayce
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Kassadin 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
Kassadin matchup data for League of Legends patch 26.22. The table below shows Kassadin'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 Kassadin build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Kassadin Matchups
Hardest for Kassadin
Easiest for Kassadin
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.
Kassadin vs Jayce FAQ - Patch 26.21–26.22
Who wins Kassadin vs Jayce?
Kassadin vs Jayce is an even matchup: Kassadin wins 50.0% of 24 games, and the 95% range (31.4–68.6%) comfortably includes 50%.
What is Kassadin's win rate against Jayce?
Kassadin wins 50.0% of 24 Mid games against Jayce on patch 26.21–26.22 (95% range 31.4–68.6%). Based on both champions' overall Mid win rates, 49.7% would be expected.
Does Kassadin counter Jayce?
Not clearly. Kassadin wins 50.0% of 24 games against Jayce, and the 95% range (31.4–68.6%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Kassadin or Jayce?
There are not enough games with a 15-minute snapshot yet (19) to say who wins lane.
Does Kassadin outscale Jayce?
There are too few games of each length to tell yet.
When is Jayce strongest against Kassadin?
On current data there is no stage of the game where Jayce is ahead of Kassadin beyond the margin of error.
What should Kassadin build against Jayce?
There are not enough games for a matchup-specific core, so use Kassadin's usual Mid core: Rod of Ages, Malignance, Mejai's Soulstealer.
What runes should Kassadin use against Jayce?
Use Kassadin's usual Stormraider's Surge page (Sorcery + Domination); there are too few games for a matchup-specific page.