Baltimore Orioles outfielder Mark Trumbo (knee) is beginning a minor league rehab assignment on Tuesday. Trumbo started a rehab assignment in June, but stopped after suffering a setback to his surgically repaired knee. Trumbo has been sidelined all season, but could return in mid-August. However, the Orioles will likely use him as a part-time player. He won't have much fantasy value outside from AL-only leagues once he's cleared to play.