Version 12 Enhancements

Enhancements in Diamond Mind Baseball Version 12

Last updated: December 12, 2023

This page summarizes the most significant additions and changes in version 12.

League Rules and Options

Three-batter minimum. The option to enforce MLB's new rule that requires pitchers to either face a minimum of three batters in an appearance or pitch to the end of a half-inning, with exceptions for injuries and ejections. This option can be enabled/disabled in the Rules/options for your League/Org in the game's Organizer window.

Runner-on-second for extra innings. In tied games, every half-inning after the final scheduled inning will begin with a runner on second base. This option can be enabled/disabled for the regular-season and the postseason separately in the Rules/options for your League/Org in the game's Organizer window.

No-pitch intentional walk. The option to allow intentional walks to be granted without the pitcher throwing four balls. This option can be enabled/disabled in the Rules/options for your League/Org in the game's Organizer window.

Restrictions on batters pitching. Position players are unable to pitch except in extra innings or when their team is ahead or trailing by more than six runs. This option can be enabled/disabled in the Rules/options for your League/Org in the game's Organizer window.

Adjustable Injured List Duration. The minimum duration (in days) that should be used when an injured player is placed on the Injured List can be adjusted. Separate values may be entered for batters and pitchers.

Collisions at Home Plate. Option to restrict the number of collision plays at home plate in support of MLB rule 6.01(i) that governs "Interference, Obstruction, and Catcher Collisions".

Starting Pitcher as DH. Commonly referred to as the "Ohtani rule". This option allows a team to choose the same player as both the starting pitcher and designated hitter (DH) and then make in-game substitutions as if there are two different players in the lineup.

Pick throw limit. In 2023, baseball implemented a new rule that limits a pitcher to only three pickoff attempts during a plate appearance. If on the third attempt the pitcher fails to make an out, a balk will be called.

7-inning games. Support for scheduled games of different lengths (5 to 9 innings) to accommodate the 7-inning double-header rule adopted in by MLB in 2020 and that is also used in minor league games. This change includes the necessary adjustments to the computer manager to recognize late-inning situations based on the scheduled number of innings.

Rosters and Manager Profiles

Allow Pitchers to Bat Other than Ninth. For saved lineups where the designated hitter (DH) is not in use, the pitcher's spot in the lineup is represented by the PITCHER placeholder text and can be moved to any position in the batting order.

Expanded Pitching Roles. The number of slots for pitching roles has been expanded. You can now set a rotation with three, four, five, six or seven pitchers. You can also assign up to seven pitchers in each of the relief roles.

 Expanded Depth Charts and Saved Lineups. The number of saved lineups has been increased from six to eight. You can also now assign up to seven utility players at all positions in the depth chart.



Manager/Player Tendencies. New double switch tendency that influences how often the computer manager will prefer a double switch to a simple pitching change.


Option to Reset postseason rosters to simplify preparing active rosters when the postseason begins.

Real-life transactions and lineups will be turned off if all players are released or if a new schedule is assigned to a league/org.

More report customization options. The maximum number of columns in customized reports has been increased from 24 to 32.

Openers. A pitcher with no starting rating who is used as a starter will now tire the same as if they are making a regular relief appearance. In other words, a player with a relief rating of Poor will tire more quickly than a player with a relief rating of Excellent.

Updated historical info. The master era and player files have been updated to include seasons up to 2023.

Historical Ballpark Database. Diamond Mind's complete historical ballpark database, previously sold separately, is now included with the game (updated through the 2023 season).

Increased maximum limit for Playing Time Penalties to 500% (current limit is 250%)

The number of allowed saved databases has been increased. It is now possible to have more than 200 database references.

Added three new transaction type pairs: 7 Day IL/Activate, Shutdown/Return, Paternity/Return.

Many enhancements to the computer manager, especially those related to the computer's use of the bullpen in the later innings.

Updates and corrections to the play-by-play library. Includes support for new features and various fixes.

Various fixes for a number of frequently reported issues.