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I updated the original post with information on pitcher groundball percentage rating.
Pitcher Groundball Percentage:
From what I can tell, OOTP does not currently import pitcher groundball percentage accurately. This data exists for pitchers since 1916 on baseball reference but I do not know if the database has been updated. For 1871-1915 we have estimated team GB% that can be assigned to all pitchers on a given team for those seasons so that team GB% is accurate in the game.
In 2004 Kenny Rogers had a 1.07 GO:AO ratio, this is 1.07 groundouts per 1.00 airouts. Translating this to a groundball percentage is 1.07/(1.07 + 1.00) = 1.07/2.07 = .516 which rounds to 52%. He pitched 635 outs and struck out 126 batters, so 635 – 126 = 509 outs on balls in play. 509*.52 = 265 groundball outs and 509 – 265 = 244 airouts. It is important to calculate the groundball and airout totals when basing statistics on 3yrs and 5yrs, so that the seasons can be tallied and a proper weighted average found.
I started a 2004 replay and Kenny Rogers imports at 56%. The 2004 GO:AO ratio for mlb was 1.09, which is 1.09/2.09 = .521, which rounds to 52%. Kenny Rogers and the league are both 52%. In the editor we get 56% for Rogers and the editor says (54% = average) as a standard for OOTP. Even if OOTP was translating everything to a 54% standard, then Rogers being league average should receive 54%, but he is not. I do not know why pitcher GB% is not being correctly imported, but it needs to be corrected. We have pitcher data since 1916 and we can use estimated team data that I have in the teams file for pitchers from 1871-1915 so that we can get better imports for any season.
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