Treinen (shoulder) was credited with a victory but also charged with a blown save during Triple-A Las Vegas' win over Reno on Monday, allowing three earned runs on four hits over an inning and recording no walks or strikeouts.

EDGE Analysis

Treinen fired 20 pitches overall during his eventful frame, getting 15 into the strike zone. However, he allowed a pair of home runs to Wyatt Mathisen and Kevin Cron, which led to the bloated line. Despite his struggles, the veteran reliever is expected to be activated when first eligible Wednesday.

Treinen (shoulder) will make a rehab appearance for Triple-A Las Vegas on Monday, Martin Gallegos of MLB.com reports.

EDGE Analysis

A report Saturday had confirmed Treinen would be making a rehab appearance for one of the Athletics' minor-league affiliates, and this latest news confirms that outing will be with the Aviators. Treinen is expected to only need one turn at the minor-league level before activation when first eligible Wednesday.

Treinen (shoulder) threw a successful 31-pitch bullpen session prior to Saturday's game against the Angels, Martin Gallegos of MLB.com reports.

EDGE Analysis

The veteran closer reportedly came away healthy from the session, and he'll now get a rest day on Sunday. Treinen is then slated to pitch a rehab outing with one of the organization's minor-league affiliates Monday, and if he remains free of setbacks, he's projected for activation when first eligible Wednesday.

Treinen threw 20 pitches off flat ground Thursday, Martin Gallegos of MLB.com reports.

EDGE Analysis

This was the first time Treinen threw since being placed on the 10-day injured list on June 22. He'll have a rest day built in Friday, with the next step in his recovery being a bullpen session.

Treinen landed on the 10-day injured list with a strained rotator cuff Saturday, Susan Slusser of the San Francisco Chronicle reports.

EDGE Analysis

The injury perhaps partially explains why Treinen has allowed five runs over his last four innings of work. It's not yet clear how much time he's expected to miss. Liam Hendriks, who got the save Saturday against the Rays, is expected to close in his absence.

Treinen struck out one batter in a perfect inning to earn the save in Monday's win over Baltimore.

EDGE Analysis

Treinen has now locked down his last 10 save opportunities, bringing him to 16-of-18 on the year. His 3.31 ERA and 36:19 K:BB are a bit disappointing, but the 30-year-old has still been pretty effective closing out games.

Treinen allowed one run on one hit with a strikeout and walk during a save in a 4-3 victory against the Rays on Tuesday.

EDGE Analysis

This appearance somewhat epitomizes Treinen's season. He owns a 3.51 ERA and 1.50 WHIP, which are both rather high for a closer, but he is also 15-for-17 in save chances. One of his biggest issues is 19 walks in just 33.1 innings. Treinen also has 33 strikeouts this season.

Treinen yielded two runs (one earned) on three hits and a walk Sunday, striking out one and earning the save over Texas.

EDGE Analysis

Treinen was called on to protect what was thought to be a comfortable 9-6 lead but he certainly made things interesting. He allowed a pair of singles in between a couple of outs before a third single and a passed ball brought home two runs. The 30-year-old forced Ronald Guzman to line out with two on to end the contest. Treinen's ERA is up to 3.34 but he's still 14-of-16 in save chances and has a solid grip on the job in Oakland.

Treinen walked two and allowed a hit in a scoreless inning Friday night against the Rangers to secure the save.

EDGE Analysis

Treinen retired the first batter of the inning, but he would then allow a base knock and a pair of walks before inducing a double play to end the ballgame. The right-hander has now put together three straight scoreless outings, dropping his ERA to 3.16 with 31 strikeouts over 31.1 innings this season.

Treinen struck out two in a perfect ninth inning Tuesday to record his 12th save of the season in a 4-2 win over the Angels.

EDGE Analysis

It was a strong bounce-back effort after Treinen walked three batters without a strikeout over two innings in his last appearance Sunday. The right-hander hasn't been anywhere near as dominant in 2019 as he was last year, posting a 3.26 ERA, 1.35 WHIP and 31:15 K:BB through 30.1 innings. However, he's still been mostly effective as Oakland's closer, converting 12 of his 14 save chances.