The Orioles are expected to shut down rookie pitcher Brian Matusz soon. Matusz has thrown 157 2/3 innings this season, his first in the professional baseball. He has thrown 44 2/3 of those innings for the Orioles. "It's really just a function of the innings and what is best for the kid," Orioles president of baseball operations Andy MacPhail told the Baltimore Sun. "Whether it's a good outing that he ends on or a bad one, it's really a mathematical equation. He really was here before I would have preferred him to be here and he's acquitted himself to this point extraordinarily well." He is 5-2 with a 4.63 ERA this season. "I think you have to do the right thing no matter what, whether a guy is pitching good or not, but I think it's a little easier, if, in fact, you did shut the guy down, that you leave him with the game that he had [Saturday]," manager Dave Trembley said. "That could be the swan song, so to speak. I always think you look at the whole body of work and the entire situation and you base the decision on that."