MacroMind matchup data: real ranked games, not opinions
Jayce vs Cassiopeia
How often does Jayce beat Cassiopeia in Top?
Jayce into Cassiopeia in Top: 52% observed win rate across 202 ranked games.
Global ranked sample: games from every region and every rank pooled together, not one server's stats. Data runs through patch 26.12; curves updated 2026-08-07.
By 15 minutes the median game has Jayce ahead by 198 gold.
Jayce at 15:00
- Gold: +198
- CS: -4
- XP: -30
Typical gap to Cassiopeia, from 201 games that reached 15:00.
Does Jayce counter Cassiopeia?
No counter here: Jayce sits at 52% over 202 games. The swing lives in the spots below, so play the side you know better and chase the row that moves the number the most in this lane, then hold that lead through the first back.
Beating Cassiopeia: the Jayce game plan
A gold lead at 10:00 puts Jayce at 56% across 106 games. Flip the lead and Jayce falls to 48% across 96.
| The spot | Win rate | Games |
|---|---|---|
| Ahead in gold at 10:00 | 56% | 106 |
| Behind in gold at 10:00 | 48% | 96 |
| First blood | 56% | 89 |
| +kills at 10:00 | 56% | 79 |
| +CS at 10:00 | 52% | 84 |
Someone usually dies here around 4:24 in the median game, and level 6 lands near 5:40. Until your spike is online, respect the all-in.
Jayce's Top build, with receipts
Into Cassiopeia specifically, Jayce finishes Youmuu's Ghostblade first most often: 41.3% over 46 games of this matchup.
The most-finished Jayce core is Youmuu's Ghostblade, Manamune, Serylda's Grudge: 55.0% across 2,411 games when all three got done. All matchups, patches 26.1-26.12.
Most games start Doran's Blade + Health Potion; the first finished item is usually Youmuu's Ghostblade (10,943 games).
Skill plan: Jayce players max Q first and take Q at level 1.