The Athletics placed Drew Pomeranz on the 15-day disabled list with a left AC joint sprain and recalled Arnold Leon from Triple-A Nashville to join the A's bullpen before Wednesday's contest against the Houston Astros, the Bay Area News Group's John Hickey writes. Pomeranz exited Monday's contest at Minute Maid Park in the bottom of the fifth inning with left shoulder soreness. The club wants to get a handle on what is a recurring issue for Pomeranz before returning him to the rotation, according to Hickey. He will see doctors in the Bay Area today.
Kendall Graveman will most likely be recalled on Saturday to start in Drew Pomeranz's place. He is on turn to start for the Nashville Sounds on Friday. With the big league club, he struggled to the tune of an 8.27 ERA in four starts for the A's after a brilliant spring. In four starts for the Nashville Sounds, however, Graveman has a 1.85 ERA in 24⅓ innings with 14 strikeouts and nine walks.
Despite occasionally brilliant starts, Pomeranz continues to struggle with getting deep into games, often going to three-ball counts even if he does not allow walks. He has allowed five walks in two different games, the start he was pulled from on Monday and on May 7 against the Minnesota Twins. Pomeranz has a 4.40 ERA in 43 innings, striking out 32 and walking 16.
Arnold Leon makes his second trip this year to the A's bullpen pitched 12⅓ innings in the last three days. Neither Sonny Gray, nor Drew Pomeranz, nor Scott Kazmir was able to go past the fifth inning in their last start. Leon pitched one inning in his major league debut against the Los Angeles Angels, conceding one run, two hits, and a walk while striking out one in the ninth inning of Oakland's 9-2 victory.