Swaps are only permitted for Daily contests. Swaps will not occur in season-long Best Ball.
Best Ball
When players are traded in real life or retire, entrants will accumulate points based on the player's performance on the new team. Entrants are not permitted to swap players, even if a player in their lineup is no longer eligible to earn points.
For CFB Best Ball, if a player were to transfer out of the Power 4, they would not accumulate points throughout the season. If they transfer from one Power 4 team to another, they will still accumulate points.
Daily
Traded/Injured/Retired or otherwise inactive players will be swap-eligible in daily drafts if they become inactive prior to the contest's listed start time.