Bob Wojnowski, Lynn Henning and Chris McCosky wrap up the season for the 2018 Detroit Tigers. The Detroit News, The Detroit News


One surgery was expected; the other came out of nowhere.

The Detroit Tigers announced Thursday that starting pitcher Jordan Zimmermann and rookie outfielder Christin Stewart had core muscle repair surgery Thursday in Philadelphia.

The surgeries were performed by Dr. William Meyers.

"According to Dr. Meyers, both surgeries were successful and both players are expected to be ready for Spring Training," the Tigers tweeted Thursday afternoon.

Stewart was shut down for the final three games of the season with a lower abdomen injury, and it was announced that he would visit Dr. Meyers after the season. So that he had the procedure was not unanticipated. 

Zimmermann, however, had no known issues with his groin or core muscle area. He missed time during the year after taking a liner off the jaw and with a shoulder impingement.

But he made his final 13 starts after the All-Star break. Zimmermann, 32, wrapped up his third season in Detroit, going 7-8 with a 4.52 ERA and 1.26 WHIP in 25 starts spanning 131.1 innings.

Stewart, the Tigers No. 6 prospect according to MLB Pipeline, appeared in 17 games following a September call-up to the majors. He hit .267 in 60-at bats, with two home runs (both coming in the same game) and 10 RBIs, striking out 13 times before a lower abdominal strain sidelined him for the remainder of the season before the final series of the season in Milwaukee.

Stewart clubbed 23 home runs, and drove in 77 in 122 games this season at Triple-A Toledo, where he hit .267.

Twitter: @cmcosky