Miles Mikolas was placed on the 10-day injured list Sunday, a day after leaving his first Major League start since the 2019 playoffs with forearm tightness.

The St. Louis Cardinals activated the right-hander Saturday for his first start since the 2019 NLCS. He missed last season after flexor tendon surgery, then hurt his pitching shoulder in his first bullpen session of 2021.

Mikolas, 32, allowed three hits in four innings, struck out three and walked one, allowing one run Saturday against the Chicago Cubs.