​In pursuit of an NL Central title, the Milwaukee Brewers took a tough hit to their bullpen as All-Star closer ​Corey Knebel went down with an injury. 

Knebel will be out for at least six weeks. 

As a result of that unfortunate occurrence, the Brewers have made a couple of roster moves ahead of Saturday's game with divisional rival, the Chicago Cubs. 

Milwaukee has decided to call up right-handed reliever, ​J.J. Hoover from Triple-A. Prior to coming to the Brewers, Hoover made major league appearances with the Cincinnati Reds and Arizona Diamondbacks. 

Hoover can be used an effective bullpen arm during Knebel's absence. He has posted an ERA in the bigs as low as 2.94 and had a K/9 rate of 11.8 in 2017. 

The Brewers have also sent Brandon Woodruff to Triple-A and have designated Tyler Webb for assignment. Woodruff failed to have an ERA under 4.50 in the past two seasons and Webb has yet to throw in the bigs for Milwaukee this season. 

Milwaukee's arms will continue to be put to the test as they head into game three with the Cubs.