I have posted updated .csv files for the "Lahman Baseball Database" to this URL: http://www.sportsmogul.com/database/2015-Updates.zip
These files include updated batting, pitching and fielding stats for the 2015 season, along with biographical data for all players that made their MLB debut in 2015, and updates to the "teams" and "managers" files.
The 2015 stats were extracted from the game files at retrosheet.org. (We needed to extract this data, plus additional PBP data, as part of our development and testing schedule for "Baseball Mogul 2016" -- and we couldn't wait for a new database update to became available at baseball1.com or baseball-databank.org.)
The following files are included:
(I'm sorry that we haven't yet built the tools to compile the 2015 post-season stats.)
As with the 2014 release of the Lahman Baseball Database, this entire work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License. For details see: http://creativecommons.org/licenses/by-sa/3.0/
I believe these files should be compatible with PureSim Baseball and/or OOTP Baseball, depending on which version you are running (it has been a few years since I have played either of these games).
If you are interested in helping test this updated data in Baseball Mogul, please apply for the Baseball Mogul Beta Test.