Baseball games on television are, just by the way the sport is played out, going to have a lot of commercials. Two commercial breaks per full inning means you’re having about 18, and that doesn’t include ones in-between pitching changes, extra-inning games, etc. Over a full season you’re gonna see a lot of the same commercials over again. (This year I’ve noticed “The New York based people of Italian descent admiring a sandwich” for Subway), but you’re also gonna get things that are there to kill time.
I’ve noticed in the past few season, that a fair amount of ads during Diamondbacks games are for Class-Action lawsuits.