Mlodzinksi was placed on the 15-day injured list Tuesday due to a right shoulder strain, Noah Hiles of the Pittsburgh Post-Gazette reports.

The right-hander presumably suffered the injury in his appearance against the Astros on Monday, during which he allowed a hit and a walk over a scoreless inning. Mlodzinski will be eligible to be reinstated in mid-August, though it's unclear if he's expected to be healthy by that point.