Public Leagues are guaranteed to have 12 teams for the draft. If a Public League isn't full prior to the draft, teams are added from a pool of available managers to reach the required 12 teams.
Custom League drafts run as scheduled with as few as four teams signed up.
Leagues with less than four teams at draft time do not draft. Instead, they're switched to become a pre-draft Autopick League as soon as their draft time passes. These leagues then need to get a fourth team registered and reschedule their draft.
All Head-to-Head Leagues must have an even number of teams in order to be drafted.
Head-to-Head Leagues with an odd number of teams are switched to become a pre-draft Autopick League as soon as their draft time passes. These leagues then need to arrange for an even number and reschedule their draft.
No live drafts are held after November 2, and no leagues are drafted after November 30. So, all Autopick teams and leagues must be switched to Ready status by 11:59 pm PT on November 29. Likewise, all offline draft leagues must complete and enter their information, and hit the Begin Season button by 11:59 pm PT on November 29.