Seeking seats in the bullpen Barring injuries or trades, most of the Orioles' Opening Day roster is already set with the exception of two or three vacancies in the bullpen. Mike Gonzalez, Jim Johnson, Koji Uehara and Mark Hendrickson are locks, but there are still two or three spots available and a handful of competitors. Pitcher IP ER H BB K's Jeff Zrebiec's skinny Matt Albers, rhp 4 1/3 0 2 0 1 Throwing his sinker for strikes as he did in 2008.Jason Berken, rhp 4 0 1 1 2 Made 24 starts last year but has uphill battle to make club. Alberto Castillo, lhp 3 1 4 0 2 Multiple arm slots make it tough for hitters.David Hernandez, rhp 6 1/3 5 8 0 12 The club's sixth starter is more likely in Triple-A rotation.Cla Meredith, rhp 2 2/3 0 0 0 2 Submariner is front-runner for spot after a strong start. Kam Mickolio, rhp 3 1 2 1 2 Club wants him on roster, but he needs to seize opportunity. Will Ohman, lhp 3 0 1 1 5 Most experienced option for left-handed situational role.Dennis Sarfate, rhp 4 2 5 1 1 Hard-throwing righty is healthy again but inconsistent.Alfredo Simon, rhp 3 2 3 0 3 A dark horse for second straight year despite elbow surgery.