Blake Treinen Passes Important Test During Dodgers Rehab Assignment

Blake Treinen’s latest rehab appearance may not jump off the page statistically.

For the Los Angeles Dodgers, however, what happened Thursday was considerably more important than one line in a Minor League box score.

Treinen pitched on back-to-back days for the first time during his current rehabilitation assignment.

The veteran right-hander recorded one out and issued one walk while throwing 15 pitches, eight for strikes, for Triple-A Oklahoma City against El Paso. Most importantly, he did not allow a run and successfully completed his first consecutive-day workload since beginning the rehab process.

For a reliever trying to return from right elbow inflammation, that is a significant step.

Treinen Finally Gets the Back-to-Back Test

Thursday’s appearance came one day after Treinen worked a scoreless inning for Oklahoma City.

On Wednesday, he threw 13 pitches, eight for strikes, struck out one batter and hit another while keeping El Paso off the scoreboard.

Then the Dodgers sent him back to the mound Thursday.

That decision matters because Major League relievers cannot always count on a recovery day between appearances. A pitcher expected to work meaningful innings in September or October must be capable of getting outs one night and potentially being available again the next.

Treinen had already demonstrated that he could pitch effectively during the rehab assignment.

Now the Dodgers needed information about how his elbow would respond when the recovery window became much shorter.

He has cleared that test on the mound.

The next important evaluation will be how the elbow responds afterward.

Treinen Has Yet to Allow a Run During Rehab

The back-to-back workload is the larger story, but Treinen’s results have also been encouraging.

Thursday marked the fifth appearance of his rehab assignment, which began Aug. 15 with Single-A Ontario before shifting to Triple-A Oklahoma City. He has not been charged with a run in any of those outings. MLB’s records show the assignment began Aug. 15, while Oklahoma City’s recent recaps document his continued scoreless work with the Comets.

His first rehab appearance was especially sharp.

Treinen threw a perfect inning for Ontario and struck out two hitters in his first game action since June.

He has continued to stack scoreless outings since moving up to Triple-A.

That is encouraging, but the Dodgers are evaluating more than ERA during this process.

Velocity matters.

Command matters.

Pitch shape matters.

Recovery matters.

And for someone expected to work out of the bullpen, availability on consecutive days matters considerably.

Thursday gave Los Angeles its first look at that final component during this rehab stint.

Why Back-to-Back Games Matter So Much

A starting pitcher can return from injury while operating on a predictable schedule.

Relievers do not have that luxury.

A high-leverage bullpen arm might pitch Tuesday, be asked to get critical outs again Wednesday and then possibly need to warm up Thursday depending on how a game develops.

That uncertainty places different demands on the arm.

The Dodgers therefore need to know Treinen’s elbow can tolerate not only the stress of an individual appearance, but also the abbreviated recovery period between outings.

Interestingly, this is not the first time Los Angeles has used consecutive-day appearances as an important milestone for Treinen.

During his 2025 rehabilitation assignment, MLB reported that pitching on back-to-back days was the final box Treinen needed to check before being considered for activation.

That does not automatically mean Thursday was the final requirement this time around.

The Dodgers have not announced an activation date.

But it does illustrate why the workload test carries more significance than whether Treinen recorded one out or three.

Treinen Has Been Out Since June

Treinen last pitched for the Dodgers on June 19.

Los Angeles placed him on the 15-day injured list the following day because of right elbow inflammation. The club later transferred him to the 60-day IL on Aug. 11.

His road back has been deliberately gradual.

Treinen progressed through throwing work and live batting practice before the Dodgers cleared him to begin the Minor League rehab assignment Aug. 15.

MLB currently lists his expected return as sometime in September.

Given his injury history and the importance of his role when healthy, there is little reason for Los Angeles to rush the final stages.

The Dodgers need more than Treinen simply being available.

They need confidence that he can handle the unpredictable workload required of a postseason bullpen arm.

A Healthy Treinen Could Give Dodgers Another Late-Inning Option

Treinen’s return would arrive at an important time for a bullpen that continues to evolve heading toward the postseason.

When healthy and effective, the 38-year-old has extensive experience pitching in high-leverage situations.

He is a former All-Star and has been part of three World Series championship teams with Los Angeles, including the Dodgers’ titles in 2020, 2024 and 2025.

Treinen appeared in 29 games before landing on the injured list this season, posting a 3.52 ERA with 25 strikeouts across 23 innings.

Those numbers were not as dominant as some of his best seasons, but the Dodgers know what his sinker-slider combination can look like when everything is working.

If Treinen returns healthy, Roberts gains another experienced arm capable of handling important outs.

The key word is healthy.

That is why Thursday mattered.

The Results After Thursday May Matter Most

Treinen did not have to strike out the side Thursday for the appearance to be successful.

He needed to pitch.

He needed to do it one day after pitching.

And now he needs to recover normally.

If the elbow responds without renewed discomfort, the Dodgers will have evidence that Treinen can handle a workload much closer to what would be expected from him in the Major Leagues.

There may still be another rehab appearance ahead, and Los Angeles has not publicly committed to when Treinen will be activated.

But his rehabilitation is clearly moving into a different phase.

Early rehab outings are about proving a pitcher can compete again.

Late rehab outings are about proving he can withstand the job he is returning to.

For a reliever, back-to-back games are part of that job.

Blake Treinen has now passed that test on the mound. If his elbow responds well afterward, his return to the Dodgers bullpen could be getting considerably closer.