Before tonight's series opener against the Boston Red Sox, the Orioles are expected to place Brad Bergesen (bruised left shin) on the disabled list and recall reliever Chris Ray from Double-A Bowie. ... That will leave the Orioles with an eight-man bullpen and only four starting pitchers, and potentially force them to make another roster move Tuesday, when Bergesen was scheduled to start against the Detroit Tigers. The Orioles also could opt to put one of their long relievers -- Mark Hendrickson or Brian Bass -- in the rotation for a couple of starts. Bergesen, the rookie right-hander who is 7-5 with a 3.43 ERA and had emerged as a legitimate American League Rookie of the Year candidate, was hit in the left shin on Thursday by a liner off the bat of Kansas City Royals' first baseman Billy Butler. Bergesen limped off the field, but then collapsed in the tunnel leading up to the Orioles' clubhouse. He had two sets of X-rays done and both came back negative. However, he left Camden Yards on crutches Thursday, and in a significant amount of pain. The Orioles don't want to take any chances with the 23-year-old, who has been the team's most consistent starter this season.