Mechanics of pitchers v. throwers
My father was also a pitcher on the fringes of making the majors, and he would have thought it was ludicrous that they had the pitchers throwing from a stretch instead of a windup. Nothing was said about avoiding arm injury, kinesiology or proper form, though the actors did do a convincing job of demonstrating it. The movie leaves the impression that if you are a good thrower with control and something akin to a fastball, you are automatically a pitcher, and a potential major leaguer at that! All of which is less believable than the learning of a totally strange sport as an adult.
Nobody knows what "literally" means anymore. Literally.