7:25pm: Treinen’s dealing with a mild rotator cuff strain, per Martin Gallegos of MLB.com.
6:29pm: The Athletics have placed closer Blake Treinen on the 10-day injured list with a right shoulder strain, Susan Slusser of the San Francisco Chronicle reports. The strain’s muscular, not structural, Slusser adds.
While Treinen’s injury may not be severe, it’s the second sizable blow to the playoff-contending A’s pitching staff in as many days. They lost ace Frankie Montas to an 80-game suspension for performance-enhancing drug use Friday.
The injury has bothered Treinen for a while, Slusser tweets, which may somewhat explain the 30-year-old’s decline in 2019. Treinen was close to untouchable last year, as evidenced by a nearly nonexistent 0.78 ERA in 80 1/3 innings, but has registered a 4.08 ERA in 35 1/3 frames this season. Treinen’s 4.11 FIP suggests his bloated ERA hasn’t been the product of bad luck. His 9.17 K/9 and 5.35 BB/9 also represent marked drop-offs from his otherworldly production in 2018.
It’s unclear who will take over for Treinen as Oakland’s closer during his absence. Treinen has totaled all 16 of the A’s saves this season, after all. Lou Trivino, Yusmeiro Petit, Ryan Buchter, Liam Hendriks and Joakim Soria rank 1-5 in their bullpen in holds. Soria has amassed 220 saves in the majors, which makes him a logical pick to serve as the A’s game-ending solution on paper, but the 35-year-old has had difficulty preventing runs this season.