RHP Frankie Montas (right shoulder inflammation) Expected return: Possibly second half Montas underwent arthroscopic surgery on Feb. 21 in Los Angeles, a procedure performed by Dr. Neal ElAttrache, who cleaned up the hurler’s labrum. Montas said that he “for sure” expects to pitch in the big leagues this season, and he could begin playing catch as soon as the week of May 7. Aaron Boone said on May 1 that Montas was “getting close to starting a throwing program.” Recurring inflammation in the shoulder affected Montas last season with the Athletics and Yankees, and he said that he “wasn’t fully 100 percent” when New York acquired him in a six-player trade on Aug. 1. He was transferred to the 60-day injured list on April 3. (Last updated: May 1)