Organizational Structure
Each LDB franchise has three tiers: Majors, the Injured List (IL), and AA.
Majors
The Majors level is a 31-man roster and represents the active players on the team whose performance may affect scoring. It closely resembles an MLB franchise. All 31 players are available for active duty, and are broken down into the following positions:
| Hitters | Pitchers |
|---|---|
| Catcher | Starting Pitchers (Up to 5) |
| First Base | |
| Second Base | |
| Short Stop | |
| Third Base | Relief Pitchers (Up to 6) |
| Left Field | |
| Center Field | |
| Right Field | |
| Designated Hitters (Up to 2) | |
| Bench | |
This structure changes during playoffs. See Playoff Rosters for more information.
Positional Eligibility
Hitters
A player is eligible for an offensive position if (1) that player made 17 appearances in that position during the previous season or (2) the player appeared at that position for 50% of games in April of the current season, or, after April, appeared at that position a total of 12 times during the season. Until a hitter meets one of these thresholds, he may bat as a designated hitter only.
Pitchers
To be eligible as a starting pitcher, a player must have appeared as a starting pitcher in one game during the previous or current season. To be eligible as a relief pitcher, a player must have appeared as a relief pitcher in one game during the previous or current season.
Injured List and Suspended List
In addition to a its 31-man roster, each team may have up to six players on its injured list (IL). A player in the Majors is eligible to be on the IL when he is on the MLB IL. See Internal Transactions for other rules related to the IL.
Players suspended in MLB will not count against the LDB 31-man roster. Suspended players may be placed in the LDB team's minor league without being subject to waivers. They must return to the active 31-man roster immediately upon conclusion of the MLB suspension.
AA
The AA tier is a roster of unlimited rookie players signed in the AA draft. See Internal Transactions for rules relating to the consequences of promoting a player out of AA.