The Brewers reinstated Clarke (knee) from the injured list Wednesday and optioned him to Triple-A Nashville, Curt Hogg of the Milwaukee Journal Sentinel reports.

Clarke (knee) will begin a rehab assignment Sunday with Triple-A Nashville, Curt Hogg of the Milwaukee Journal Sentinel reports.

Brewers general manager Matt Arnold said Wednesday that Clarke (knee) should return by late May, Todd Rosiak of the Milwaukee Journal Sentinel reports.

Clarke underwent surgery Saturday to repair the meniscus damage in his right knee, Todd Rosiak of the Milwaukee Journal Sentinel reports.

Manager Pat Murphy said Saturday that Clarke (knee) underwent imaging earlier in the week, Curt Hogg of the Milwaukee Journal Sentinel reports.

The Brewers acquired Clarke from the Royals on Thursday, Robert Murray of FanSided.com reports.

Clarke signed a one-year contract with the Royals on Saturday, avoiding arbitration.

Clarke (3-6) allowed three runs on three hits and struck out one over two-thirds of an inning to take the loss Tuesday versus the Tigers.

Clarke recorded the final out of Saturday's 10-8 win over the Astros to pick up his second save of the season.

Clarke gave up a solo home run and struck out three in the ninth inning Friday to record his first save of the season in a 4-2 win over the Astros.