|Bats / Throws||Right / Right|
|Date of Birth||6/30/1988|
|Height, Weight||6'5", 225 lbs|
|College||South Dakota State|
|Drafted||2011 - Rd 7|
Treinen will not pitch again this season due to a stress reaction in his back, Susan Slusser of the San Francisco Chronicle reports.
One of the top-two closers off the board in many mixed-league drafts, Treinen was a massive disappointment. He logged a 4.91 ERA, 1.62 WHIP and 59 strikeouts in 58.2 innings while providing 16 saves and six wins, eventually losing the closer's job to Liam Hendriks. Chris Bassitt is moving to the bullpen to help make up for Treinen's absence. Treinen hopes to be available for the postseason. He said he has had the issue for three weeks and thought he could pitch through it before an MRI revealed the stress reaction.
Treinen allowed two earned runs on two hits and two walks over an inning in a win over the Rangers on Friday. He struck out one.
Treinen was brought on with a comfortable 14-7 lead in the ninth and worked himself into a jam by putting the first three batters he faced on base via an infield single and a pair of walks. The right-hander ultimately allowed a two-out single to Elvis Andrus that plated two of those runners before inducing a game-ending pop-up from Willie Calhoun. Treinen's latest hiccup is symptomatic of the inconsistency that's plagued his 2019 campaign, one that's seen him allow multiple earned runs on nine occasions after doing so only twice during his stellar 2018 season.
Treiner (back) pitched a scoreless inning, striking out all three batters he faced in Saturday's 10-2 win over the Tigers.
Treinen was called on to pitch the ninth with the Athletics holding a large lead, and he retired Jake Rogers, Willi Castro and Harold Castro in order. He needed only 13 pitches -- 10 strikes -- to complete the inning. Treinen's back issues had kept him out of action since Sept. 3, and it may limit the reliever's usage going forward, but he was at his best Saturday. The 31-year-old has a 4.71 ERA and 1.57 WHIP over 57.1 innings this season.
Treinen has been dealing with back issues, Martin Gallegos of MLB.com reports.
The nature and severity of Treinen's back problems are not yet clear. He's pitched just once in the last five days, walking two batters and allowing one run while recording just one out in that appearance.