HOUSTON -- The Baltimore Orioles placed first baseman Ryan Mountcastle on the 10-day injured list with inflammation in his left shoulder Wednesday.
The Orioles had hoped to avoid putting Mountcastle on the IL, but manager Brandon Hyde said Mountcastle tried to swing before Wednesday's series finale at Houston and it "didn't go as well as we were hoping."
Mountcastle had missed the past six games with the injury. The move is retroactive to Sunday.
"It was going really well with his progression, and he was feeling better," Hyde said. "He tried to swing the other day, and he was a little bit sore.