The Orioles weren't happy about losing their best starter for at least 15 days, but they were relieved because his scary leg injury could have been worse.
Felled by a line drive off the bat of Kansas City's Billy Butler on Thursday, Bergesen (7-5, 3.43 ERA) ended up with a bruised shin.
"We're fortunate he's only going to be out a couple of weeks," manager Dave Trembley said. "They thought maybe it was a hairline fracture, something that the X-ray first didn't see. The good news is it's not broken, there's no fracture."
Bergesen was tied for the team lead in wins and his ERA was best among starters.
To replace Bergesen and closer George Sherrill, who was traded Thursday to the Los Angeles Dodgers for two minor leaguers, the Orioles activated right-hander Chris Ray from the DL and recalled reliever Kam Mickolio from Triple-A Norfolk.
Ray was placed on the 15-day disabled list July 6 with right biceps tendinitis. He pitched three scoreless innings in a three-game rehabilitation assignment with Double-A Bowie after going 0-1 with a 9.28 ERA in 23 games with Baltimore.
"It feels really good," Ray said. "I really haven't been feeling like this since pre-injury, so it's a really good feeling."
Mickolio did not allow a run in three games with the Orioles earlier this month.
In other news, Trembley said Jim Johnson would take over for Sherrill as Baltimore's closer. Johnson has two saves and had been working as the setup man.
"The next logical thing would be to give it to Johnson and give him the opportunity to close," Trembley said, adding that the setup role would be filled on a game-to-game basis.