Any fantasy hockey pool that "rolls over" into future years is called a "Keeper" or "Dynasty" league. The leagues can be run each year in any of the above formats with a winner declared at the end of each season. At the end of the year team managers decide which players they wish to protect (the number varies - from protecting and keeping all players, to keeping as few as three or four players). Before the next NHL season begins, a fantasy draft is held to fill out the rest of the roster.