Pitchers using pine tar for one. You said there are other rules that are broken and not enforced. This is a bad example, because it is enforced when a player is caught. There is an understanding among the players that it's 'okay' for pitchers to use pine tar, or at least that's what players say, so no, I disagree that it is enforced. And yes, of course it's enforced when they are 'caught'. How many times do players get caught s year, once? Baseball is full of things that people choose to ignore. And just for the record, I am pretty sure I've seen Dan Jennings put something on his hand before he pitches. He turned his back and took his cap off and rubbed his left hand inside his cap...and I don't really care because no one else seems to either.