Arrieta starting, Chavez on the bench (updated)

Wishing reliever Pedro Strop a happy 27th birthday and passing along an Orioles lineup that once again includes Brian Roberts at the leadoff spot and second base. Jake Arrieta is getting the start tonight in place of left-hander Brian Matusz, who fouled a bunt off his nose yesterday. Arrieta will work on normal rest. Matusz is still expected to pitch Friday in Atlanta, with Tommy Hunter taking the ball tomorrow night. We're waiting for official word. Matusz is taking batting practice today with the other pitchers. Way to get back on that horse. Endy Chavez, who left last night's game with a strained right hamstring, is listed among the reserves. For the Orioles: Brian Roberts 2B J.J. Hardy SS Chris Davis DH Adam Jones CF Matt Wieters C Mark Reynolds 1B Wilson Betemit 3B Steve Pearce LF Ryan Flaherty RF Jake Arrieta RHP For the Pirates: Alex Presley LF Neil Walker 2B Andrew McCutchen CF Garrett Jones DH Casey McGehee 1B Pedro Alvarez 3B Jose Tabata RF Clint Barmes SS Michael McKenry C Kevin Correia RHP The Orioles' 2012 Food and Funds Drive results: 4,026 pounds of food and $20,350 for the Maryland Food Bank. Well done. Update: Matusz has been confirmed as the Friday starter in Atlanta. Also, Chavez said his hamstring is feeling better but is still sore. The Orioles will see how it responds in the next day or two. Chavez said, "I don't think it's that bad."