The Padre runner there in the 9th inning should have been safe for a couple reasons. First, Pierzinski clearly misses the tag, he knows he did which is why he immediately dives after him at the plate. Davidson watches all of this and makes no call for 3 or 4 seconds but honestly he seems to ask AJ if he tagged him, I kid you not. Then he calls him out. I also don't know why the runner wasn't safe due to Pierzinski blocking the path to the plate. When he catches the ball, he is 10 feet or so up the line, straddling the line. The runner didn't make this wide swing around him on the way to the plate because he wanted to, he did it because he had to. I just don't understand why in the instant replay era obvious screw ups like this are allowed to continue.