7 , ▁primarily ▁to ▁play ▁first ▁base . ▁He ▁was ▁sent ▁back ▁down ▁on ▁August ▁ 1 8 ▁and ▁re called ▁again ▁in ▁September . ▁In ▁ 1 1 9 ▁games ▁between ▁Hart ford ▁and ▁Al bu quer que ▁he ▁batt ed . ▁ 3 5 5 /. 4 0 3 /. 5 8 3 ▁with ▁ 2 0 ▁home ▁runs ▁and ▁ 8 8 ▁R B Is , ▁and ▁in ▁ 1 7 ▁games ▁for ▁Colorado , ▁he ▁batt ed ▁. 1 5 8 . ▁ ▁The ▁Rock ies ▁went ▁into ▁the ▁ 2 0 1 8 ▁season ▁with ▁Mc M ah on ▁as ▁the ▁primary ▁first ▁bas eman , ▁but ▁after ▁ 2 8 ▁games ▁he ▁was ▁sent ▁down ▁to ▁the ▁I so ptop es ▁after ▁beginning ▁the ▁season ▁with ▁just ▁three ▁R B Is ▁and ▁hitting ▁. 1 8 0 ▁in ▁ 5 0 ▁at - b ats . ▁On ▁June ▁ 1 4 , ▁Mc M ah on ▁hit ▁his ▁first ▁career ▁home ▁run . ▁On ▁August ▁ 1 1 , ▁with ▁the ▁Rock ies ▁trailing ▁ 0 – 2 ▁to ▁the ▁D od gers ▁in ▁the ▁bottom ▁of ▁the ▁ 9 th ▁in ning , ▁Mc M ah on ▁hit ▁a ▁two - out ▁three - run ▁walk - off ▁home ▁run ▁off ▁D od gers ▁closer ▁J . ▁T . ▁Ch argo is ▁to ▁give ▁his ▁team ▁a ▁ 3 – 2 ▁victory . ▁It ▁was ▁Mc M ah on ' s ▁first ▁career ▁walk - off