Features

Curveball.gg is a free browser baseball simulation built for managers and fans alike. Here is what makes it distinct.

Pitch-by-pitch simulation

Every game is simulated one pitch and one at-bat at a time from your real lineup — no fast-forward to a final score.

Watch games unfold in real time. Two managers play a full nine innings, pitch by pitch, broadcast to the browser as they happen.

Start with a squad of rookies, then build it out: set your batting order, choose your pitching staff, and shape your club.

Sign new players through Roulette and the Speakeasy to strengthen your lineup and bullpen.

Compete across a season, climb the standings, and chase a championship through the playoff bracket.