Eligibility
MLB Start-Once requires the applicable Pools entitlement and is 18+.
Core rule
Each entrant may use each eligible MLB player only once during the contest. Once used, that player is permanently unavailable to that entrant.
Scoring period
Default scoring periods run Monday-Sunday and use the standard MLB fantasy-points engine unless a supported setting changes scoring.
Default lineup
C, 1B, 2B, 3B, SS, OF x3, UTIL x2, SP x2, RP x2 and P x2. No bench is required by default.
Ownership
Player ownership is nonexclusive. The same MLB player may be selected by multiple fantasy teams in the same scoring period.
Locks and usage
Each selected player locks at the scheduled start of that player's MLB game. The platform clearly marks previously used players as unavailable to that entrant.
Pitchers and dual-role players
A pitcher used in any pitching slot is considered used for the contest. A dual-role player may be used only once total, not once as a hitter and again as a pitcher.
Standings
Default standings use cumulative Season Points across all scoring periods.
Transactions
There is no roster ownership, waiver wire or trade system in the default Start-Once format.