Koenig, who has been an 'unsung hero' for the Brewers the past two years with a 2.67 ERA over 127 games, will attempt to rehab the injury and avoid surgery. Manager Pat Murphy expressed hope for Koenig's return in two to four weeks.
Shane Drohan has been called up to replace Koenig and could make his MLB debut against the Red Sox, the team that traded him this offseason.