McMahon (calf) will start at third base and bat sixth Thursday against the Cubs, Patrick Saunders of The Denver Post reports.
McMahon was absent from Tuesday's win over the Rangers due to calf soreness, but he'll be back in action for Thursday's series opener against the Cubs. He's gone 3-for-14 with two doubles, three runs, an RBI and six strikeouts in his first four games of the season.