I was there and the line was really long to try and get one. They usually only get around 8-12 per game so I am sure they were all gone. I wanted to get one too but I wasn't waiting in the long line that started forming in the 2nd inning! They don't get them until around the 5th or 6th.

I was lucky enough to get a BP HR ball from Berkman though. Last year I got a BP HR ball from Hamilton. I just wish I could have caught one from the Astros haha.