On top of that, the AL West includes OAK, SEA, & TEX, and the first two teams also play in HR-unfriendly parks. I think the ballparks in which he'll be playing most will, overall, hurt his chances to run down #763. With all that said, though, Busch Stadium's HR PF ranks for the past four seasons are (oldest to most recent), 19th, 28th, 26th, & 27th. This is, without a doubt, one of the best power hitters & hitters of all-time. So the 'general rules' need to be either thrown out, or at least considered with a bit more scrutiny. After this season you can add the Astros which their park is a launching pad for HR's with that short porch in LF.