Manager Aaron Boone said that McMahon isn't in the lineup for Tuesday's game against Detroit due to an ear/throat infection, Pete Caldera of The Bergen Record reports.
Although McMahon will be in the dugout for the beginning of Tuesday's contest, Boone noted that there's a chance the 31-year-old could be available off the bench. Jose Caballero will get the nod at the hot corner and bat seventh while McMahon sits.