Wed Feb 06, 2013 5:22 pm
Daniel, from what I understand, the cards are based on comparison to league stats for the individual season.
In 1913 there were 3737 BBs in the AL in 45335 PA's (1 BB in every 12.13 PA). Walter Johnson had 38 BBs in 1271 Batters Faced (1 BB in every 33.44 Batters Faced) MUCH LOWER rate than the league average.
In 1876 there were 336 BBs in the NLin 20457 PA's (1 BB in every 60.88 PA). George Bradley had 38 BBs in 2269 Batters Faced (1 BB in every 59.71 Batters Faced) EQUAL to the league average.
Basing it on the individual to league ratios, Johnson should have less walks on his card than Bradley.
If we look at Bob Groom from 1913, he had 81 BBs in 1075 Batters Faced (1 BB in every 13.27 Batters Faced), much closer to the league average, his card has 1 walk on each side (as does Bradley). Bradley's BB is on a 2, Grooms is on a 6/8, which I expect is from the overall difference in BB/PA difference from 1876 to 1913.
Keep in mind that the ATG set is NOT normalized across seasons, so the 1876 BB/PA ratio isn't compared to the 1913 BB/PA ratio.
This just made my head hurt....LOL