ROSTER MANAGEMENT

Active Roster (26-Man): During the regular season and playoffs, teams may carry up to 26 players on their active roster, with a maximum of 13 pitchers.
Expanded Active Roster (28-Man): During the final two blocks of the regular season, teams may expand their active roster to 28 players, with a maximum of 14 pitchers.
40-Man Roster: Teams maintain a 40-man roster that includes all players with Strat-O-Matic cards, whether on the active roster, in the minor leagues, or on the Injured List. This is the maximum number of carded players a team may control at any time.
50-Man Roster: Teams may carry up to 50 total players, which includes:
All players on the 40-man roster
All additional uncarded minor league prospects who have been drafted or acquired via trade
Roster Compliance: Teams must remain in compliance with all roster limits at all times, including during the offseason.

Block Schedule: The regular season is organized into two-week blocks. Teams must submit their active roster by Day 1 of each block.
Playoff Rosters: Teams may modify their playoff roster between playoff rounds. Playoff roster rules mirror regular season active roster limits (26 players, maximum 13 pitchers).
Offseason Rosters: During the offseason, there is no active roster requirement. However, 40-man and 50-man roster limits remain in effect.

Players with Options (Type Y and Arbitration Contracts):
Players on Type Y (entry-level) or Arbitration contracts may be optionally assigned to the minor leagues at the team's discretion between blocks
These players do not require waivers to be sent to the minors
Teams continue to pay these players their major league salary while in the minors
These players may be recalled to the active roster at any time between blocks
Players Requiring Waivers (Type U, F, L, and X Contracts):
Players on Type U (unrestricted free agent), Type F (franchise tag), Type L (long-term), or Type X (extension) contracts may be sent to the minors, but must first pass through waivers
When a team attempts to send such a player to the minors, other teams have 48 hours to claim the player
Any claiming team must place the player on their active roster and assume the player's full contract
Waiver Process:
Teams have 48 hours from the time a player is placed on waivers to submit a claim
If multiple teams claim the same player, the team with the highest waiver priority (worst record in the appropriate league) is awarded the player
If no team claims the player within 48 hours, the player successfully passes through waivers and may be assigned to the minors

Injury Determination
- Each player on the 40-man roster who is not currently injured is evaluated for potential injury at the conclusion of each block during the regular season
- The injury determination process is conducted by the Commissioner using a formula-based system
Injury Probability Factors
- Injury probability is determined by the player's Strat-O-Matic injury rating (0-6), with pitchers receiving an additional adjustment
- Current season usage percentage (actual PA or IP compared to pro-rated expected usage based on actual MLB season statistics)
- Block number within the season
Injury Duration Factors
- When a player is injured, duration in blocks is determined by the player's actual MLB season durability (total PA or IP)
- Remaining blocks in the season
- Random variation following an exponential distribution favoring shorter injuries
Season-Ending Injuries
- Players injured for the remainder of the regular season are also unavailable for the playoffs
- Players may recover in time for the playoffs if their injury duration expires before the playoff roster is set
Injured List Placement
- Players injured through the injury system are automatically placed on the Injured List for the duration of their injury
- Teams may immediately replace IL players on the active roster with any player from the 40-man roster
- Players on the 10-day/15-day IL count toward the 40-man roster but not the active roster
- Players injured for 4 or more blocks may be placed on the 60-day IL, which does not count toward the 40-man roster
- Teams are not required to activate players immediately upon recovery
Playoff Injuries
- During the playoffs, the Strat-O-Matic Super Advanced injury system is used
- The regular season formula-based injury system does not apply during the playoffs
Formula Details
- Complete mathematical formulas for the regular season injury system are provided in the Injury System Formulas appendix

Adding Players to 40-Man Roster: Players may be added to the 40-man roster through:
The annual draft
Free agency signings
Trade acquisitions
Promotion from the 50-man roster (for prospects who receive cards)
Removing Players from 40-Man Roster: Players may be removed from the 40-man roster by:
Releasing the player (subject to dead money rules in Rule 2.5)
Trading the player to another team
Retirement
50-Man Roster Prospects: Uncarded prospects on the 50-man roster (but not the 40-man) represent players in the team's minor league system who have not yet received Strat-O-Matic cards. These players:
Count toward the 50-man limit but not the 40-man limit
Must be acquired through the draft or trade
Automatically move to the 40-man roster if they receive a card in a subsequent season
Players Losing Cards: If a carded player on the 40-man roster does not receive a card in a subsequent season (typically due to injury), that player:
Remains on both the 40-man and 50-man roster
Continues to count toward both limits
May not be removed from the 40-man roster until released or traded

Regular Season Pitcher Limit: During standard regular season blocks, teams may carry a maximum of 13 pitchers on the 26-man active roster.
Expanded Roster Pitcher Limit: During the final two blocks of the regular season with 28-man rosters, teams may carry a maximum of 14 pitchers.
No Minimum Position Requirements: There are no minimum requirements for the number of players at any specific position. Teams have full flexibility in roster construction within the pitcher limits.