Double-A reliever Adrian Houser has been recalled from Biloxi to take his spot on the roster. The 25-year-old hasn’t pitched in the majors since 2015 when he made a pair of appearances for Milwaukee.
Knebel suffered the injury in the ninth inning of Thursday night’s 8-0 loss to Chicago. The All-Star threw a pitch and then crumbled to the ground, immediately grabbing for his left hamstring. Knebel needed to be helped off the field and was unable to put any weight on his left leg.
“It was tough. It was not fun to watch,” reliever Jacob Barnes said after the game. “Obviously, we can only hope for the best with that.”
It remains unclear who will take over the role of closer, though manager Craig Counsell could choose to do it by committee.
Milwaukee hosts Chicago in the second game of a four-game series Friday night at Miller Park.