Irvin is scheduled to start Tuesday's game against the Dodgers in Los Angeles.
The Orioles called Irvin up from Triple-A Norfolk last Wednesday to make his first start with the big club since June 30. Injuries have hit the Baltimore rotation hard recently, which has resulted in Irvin getting his third trial in a starting role despite the fact that he has produced an 8.80 ERA in 30.2 innings over his last nine outings in the majors. He'll be at risk of moving to the bullpen -- if not being removed from the 40-man roster -- as soon as Zach Eflin (shoulder) and/or Grayson Rodriguez (lat) return from the injured list.