McGee was moved to the 15-day disabled list Saturday due to a left knee strain, Nick Groke of the Denver Post reports.
EDGE Analysis
McGee underwent an MRI on Saturday that likely revealed less than favorable results, and he will now move to the disabled list as a result. The top candidates to replace him in the role for the time being are Jason Motte and Carlos Estevez but manager Walt Weiss hasn't announced who will serve in the role at this point.