Zimmerman, a righthander who turns 35 later this month, was a second round pick of the Washington Nationals in 2007. He had a solid run with the Nationals as a #2/#3 starter from 2011-15, accumulating 18.9 bWAR over that period, finishing 5th in the Cy Young balloting one year and 7th in another, and making the All Star team twice.
After the 2015 season he signed a 5 year, $110 million deal with the Detroit Tigers, but wasn’t able to replicate the success he had with the Nationals, registering just 0.9 bWAR for the Tigers in 99 games over 5 years with a 5.63 ERA.
Zimmermann was trying to work as a reliever for the Brewers this year, but he announced that the bullpen role wasn’t a good fit for him, and while he wanted to keep playing, his body was letting him know it was time to hang it up.
Zimmermanz ends his career with a 95-91 record and a 4.07 ERA in 275 starts and 4 relief appearances, with a 20.3 bWAR. Congratulations to Zimmermann on a very good career, and best of luck to him as he starts the next chapter of his life.