Orioles executive vice president Dan Duquette said Monday that Wei-Yin Chen (oblique) will likely be placed on the disabled list. Chen left Sunday's start with a right oblique strain and will need some rest before he resumes throwing. Steve Johnson or Jair Jurrjens are the most likely candidates to replace him in the starting rotation. The injury is a tough blow for the Orioles, as Chen owns a quality 3.04 ERA in 47 innings across eight starts this season.