The Tigers have worked their way back into contention, thanks in part to a 30-23 record in the second half. However, right-hander Jordan Zimmermann — one of the Tigers’ most notable offseason additions — has provided very little value over that span.

On May 11, Zimmermann boasted a sparkling 1.50 ERA after seven starts. Since then, though, he’s regressed and then some. Over his next nine starts, Zimmermann pitched to a 7.30 ERA while allowing opposing hitters to slug .569 against him. At that point, the Tigers placed him on the disabled list with a lat muscle problem, and Zimmermann spent the next month-plus recovering. The Tigers’ activated Zimmermann on Sept. 6, and then on Saturday, he made his first start since going on the DL. Here’s how that went …

Jordan Zimmermann SP / Detroit Tigers vs. Baltimore Orioles (Sept. 10)

IP: 1.0H: 4R: 6SO: 0BB: 3HR: 3

So in his last 10 starts — encompassing his last 50 1/3 innings — Zimmermann has an ERA of 8.23. His ERA for the season now stands at 4.94 (84 ERA+).

The time on the DL obviously didn’t yield immediate dividends for Zimmermann, and now the Tigers need to try something else. On that front …

Consider Zimmermann to be an unknown quantity for the time being, pending the results of that simulated game.

The good news for the Tigers is that four of their starters — Justin Verlander, Michael Fulmer, Daniel Norris, and Matt Boyd — have been effective, both overall and in recent weeks. However, Zimmermann’s not even one year into a $110 million commitment, so the Tigers obviously want to figure out why he’s pitching so far below his established standards. They’ve tried one thing to that end, and now they’ll try something else.

Source: CBS Sports / Here’s the Tigers’ plan for the struggling Jordan Zimmermann