Core structure
Full rosters carry over from season to season. Year 1 uses a startup draft. Future seasons use an annual rookie/prospect draft.
Prospect / Taxi Squad
Default: 5 Prospect / Taxi Squad slots per team. Paid Commissioners may configure 0-10 supported slots. These spots sit outside the active roster for eligible developmental players.
Promotion
Promotion to the active roster is manual. A promoted player may return to a Prospect / Taxi Squad slot only while still meeting the league's configured prospect-eligibility rule.
Annual rookie/prospect draft
Default: 3 rounds, ordered worst-to-best from the prior season. Future rookie/prospect draft picks may be traded.
Transactions
Players may be traded. Supported leagues may use waivers or FAAB. Offseason roster management is supported.
Scoring and lineups
Dynasty uses the same MLB points, lineup, waiver, trade and pitching engines as standard MLB fantasy unless the Commissioner changes supported settings.
Difference from Keeper
Keeper retains only a limited number of players. Dynasty carries most or all roster ownership forward and includes a deeper prospect/rookie system.