[actionjackson]

League stats averages/ratios for the 1908 season using this method:

RL 1984: .260/.323/.385/.708, 4.26 R/G, 0.043 2B/AB, 0.007 3B/AB, 0.023 HR/AB, 0.083 BB/PA, 0.156 K/AB, 66.74 SB%, .699 DEF, .978 FLD%, .286 BABIP, 3.81 ERA, 1.345 WHIP, 8.92 H/9, 0.78 HR/9, 3.18 BB/9, 5.37 K/9, 1.69 K/BB

OOTP19 1908 sim using 1984: .258/.323/.380/.702, 4.19 R/G, 0.043 2B/AB, 0.007 3B/AB, 0.022 HR/AB, 0.085 BB/PA, 0.150 K/AB, 64.50 SB%, .699 DEF, .979 FLD%, .283 BABIP, 3.75 ERA, 1.349 WHIP, 8.89 H/9, 0.74 HR/9, 3.25 BB/9, 5.16 K/9, 1.59 K/BB

Your guess is as good as mine as to why OOTP uses BB per PA, and everything else is per AB, but that right there is a pretty fine result. Individual batting and pitching stats from the just simmed 1908 season to follow. I don't know why this system for getting the league wide numbers that you want works. I only know that it does work.

Batting stats sorted by Batting Runs, which is a counting stat that measures how far above the average hitter a hitter was. Pitching stats sorted by rWAR, which looks at a pitcher's value from the point of view of runs allowed by the pitcher, rather than his peripheral stats, which is what fWAR (or in OOTP simply WAR) does.

The only thing that disappointed me about this run through was that there's waaay too many innings being thrown by the starters, which pushes all their counting stats up. It's because the Starting Rotation Mode was set to "Start Highest-Rested". This is a random debut with 19th century starting pitchers mixed in with all other eras of starting pitchers, including today's "5-and-dive" starters. After some testing, I've determined that "Strict Rotation" is the way to go to keep these 19th century beasts in line. I do not want to lose them, as I couldn't stand the thought of not including all eras, but I also don't want pitchers pitching 350 innings with 400 K. Strict Rotation appeared to be the way to put them in line with starting pitcher innings in 1984, which is what I wanted.