“...of athletes like Hank Greenberg and Sandy Koufax”
But not very many, at least according to the movie Airplane.
Koufax was famous for refusing to pitch on High Holy days.
Maybe he was more observant than Hank, who famously enjoyed ham sandwiches during games.
Then again, Hank was a huge guy, a slugger who needed protein.
He may not have been "choosy" while playing. IDK.