Checked out some of Oswalt's stats against players around the league and found that Dan Uggla is 0-for-13 against Roy, the most by far of any active player. Pedro Feliz is hitting .452, Mark DeRosa .435, Michael Barrett .375 with only 1 HBP (far too low a number), Neifi Perez .407, Jason Bay .355 and Ryan Howard .471 just to name a few.
Josh Willingham has faced Roy 15 times and has been plunked 3 times. Jason LaRue also has been hit 3 times but in 34 plate appearances. Pujols and Adam Dunn have each hit 4 HR's off him. He struck out Jim Edmonds the most, 20 times. He faced Sammy the Clown 33 times , struck him out 15 times, allowed only 4 hits and never walked him. He owned Sammy.