Oakland Athletics starting pitcher Jarrod Parker needs to have Tommy John surgery to repair a torn ulnar-collateral ligament in his right (pitching) elbow (Susan Slusser via Twitter). As is the standard case with this procedure, Parker will be out for this entire season.
Parker, 25, actually had Tommy John surgery back in 2009 when he was a minor-leaguer, so this will be his second go-round with the surgery and rehab process.
Parker was 12-8 with a 3.97 ERA, 1.22 WHIP and 134 strikeouts in 197 innings for the AL West champion A's last season and entered this season as the likely ace of the staff.
Instead, the A's have some trouble with their pitching staff. A.J. Griffin is in the process of resting for around three weeks with discomfort in his elbow and this just happened, too:
All of a sudden, Sonny Gray and Dan Straily are the only two healthy pitchers from the originally-projected starting rotation for the A's. Tommy Milone could be slotted in along with Jesse Chavez as replacements for Parker and Griffin (at least temporarily on the latter).