For batters since 1901 with at least 5,000 plate appearances (PA):
- 99% of PA for righty batters: throw righty
- 42% of PA for lefty batters: throw lefty.
All of which has me wondering if that old adage, if actually true, might be explained by determining whether lefty batters who like the low ball throw righty. In other words, there may be a reason that true lefty batters like the low ball more than righty batters. Or maybe it's the opportunist lefty batters, those who throw righty, who like the low ball.
I do not have access to data on that level and cannot answer the question. Anybody?