Well, first there was this game, which the play-by-play doesn't note that Brian O'Nora blew the call on the Luis Rivas home run. It was a foul ball.
Then, just recently, he gave the Dodgers' the edge on calling strikes out of zone, as this wonderful graph from Brooks Baseball shows. (Click on it to make it bigger.)
Plus, he called Pudge out at home.
He hates the franchise, so I hate him.