The Braves said after Thursday’s game that Michael left the field early because of lower back tightness, according to The Atlanta Journal-Constitution.

“I’m glad he said something,” Braves manager Brian Snitker told reporters at a post-game press conference. “This early, we want to take care of that and not let it linger or anything.”

Some thought Michael’s slide at the bottom of the second inning was to blame for his back issue, with Bally Sports observing that the 22-year-old “appeared uncomfortable” after stealing second place and diving for the plate.

But Thursday’s back soreness came from when Michael hit his back on the wall during a play, Brian said, likely referring to a leap the athlete made at the wall during the Braves’ game against the St. Louis Cardinals on Wednesday, April 5, per the Journal-Constitution.