Rosters

First day that players signed in free agency for the 2020-21 season can be traded

Last day a team can pick up the team option on a player for the following season, retaining their rights

Last day a player can sign the 1 year guaranteed contract issued by their team, that would make them an unrestricted free agent the following season

Last day a team can waive a player on their roster and "stretch" their salary over several years to reduce the cost in any given season