Keepers are players that teams choose to draft again in custom leagues where this option is enabled. MY TEAM looks empty until teams draft for 2017. To view past rosters:
All teams use 'Keepers' atop the desk-top site MY TEAM tab. Team keeper selections are viewable in the desktop-site LEAGUE tab's 'Draft Info' link after the 'keeper lock date' in 'League Settings'. Past rosters, drafts, and trades are in 'History' atop the desktop-site LEAGUE tab.
League Managers only use 'Edit League Keepers' in the desktop-site MANAGE tab or Custom Draft Board.
During the Draft, NFL Fantasy distributes keepers first, but League Managers can use the Custom Draft Board to distribute them in later rounds and/or reflect offseason trade agreements. The keeper setting is a max; teams receive picks if they keep less.
Keepers go to rosters at the start of auction drafts and cost $0 if League Managers don't adjust keeper values or team budgets.