Ramirez has been on the disabled list since April 16 because of right shoulder inflammation. He made three rehab appearances -- two for Double-A Tennessee and a one-inning outing for Triple-A Iowa. In the three games, he gave up one hit over 2 2/3 scoreless innings while striking out four.
Last season, Ramirez, 26, appeared in 50 games for the Cubs and posted a 1.44 ERA. He was expected to be a key piece of the bullpen this season but was sidelined with the shoulder injury after five outings.