The what-if machine
See the season you could’ve had.
Replay a trade through every completed matchup. See the points, wins, and standings change.
Sleeper league simulator
1 Find your league
Your username is used to read public Sleeper league data. No login or password needed.
2 Pick the teams
Your team
Trade partner AOther team
Trade partner BBuild a hypothetical trade
Players move both waysTeam A sends
Select players to send
Select players to drop
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Team B sends
Select players to send
Select players to drop
The default replay keeps each actual lineup slot unchanged; only traded and dropped players affect it.