How to Import a Sleeper Team as a View-Only Mirror
Track an existing league inside Commonball without changing it: what the mirror shows and how to set it up.
Published September 10, 2026
If you already run a league on another platform, you do not have to abandon it to try Commonball. The Sleeper import feature pulls your existing team into Commonball as a view-only mirror, so you can follow your roster, matchups and scores in one dashboard alongside any leagues you start here. Because it is a mirror, it does not change your original league and no one else is affected.
The import maps your roster and scoring settings onto the Commonball display, so lineup points, weekly matchups and standings look the way you expect. You can review a player's recent output in context and cross-check against the leagues you run natively on Commonball. It is useful during the season when you want a second view of your team without switching apps.
To set it up, open the import page from your account at /import and follow the prompts to connect the league and confirm the team you want to mirror. The mirror refreshes with each scoring update. It is a tracking tool, not a live roster you set, so keep making your lineup moves in your original league.