Scott Mathieson made his major league debut for the Phillies back in June of 2006, starting a handful of games for the team and posting some terrible numbers (1-4, 7.47 ERA). Nearly four years and a Tommy John surgery later, Mathieson is finally back with the big club, this time as a flame-throwing reliever. With Lehigh this season, the righty has put up some great numbers, posting a 2.43 ERA and 1.08 WHIP while saving 12 games. Hopefully he can act as a nice midseason acquisition for a Phillies pen that lacks trustworthy arms.Mathieson was called up to replace Antonio Bastardo, who was placed on the 15 day disabled list with left elbow ulnar neuritis. Seems like every time Bastardo flashes some of his potential as a quality lefty out of the pen he goes and gets injured.