McMahon is out of the lineup for Wednesday's game against the Diamondbacks.
With the Rockies and Diamondbacks concluding their series with a day game after a night game and with a southpaw (Jordan Montgomery) on the hill for Arizona, the lefty-hitting McMahon will be given a breather. McMahon had a pair of two-hit games against Atlanta over the weekend but has fallen back into his post-All-Star-break lull at the plate so far in Arizona, as he went 0-for-8 with four strikeouts through the first two games of the series. He's now batting just .119 with a 32.1 percent strikeout rate in the second half.