The bloop hit with two outs and runners on second and third ended a frigid doubleheader at Coors Field that was scheduled after Monday's game was snowed out.
Carlos Gonzalez raced home with the winning run, giving Colorado a sweep of Tuesday's games. The Rockies won the first game 8-4.
Pacheco and Yorvit Torrealba both had two RBI in the game. Rafael Betencourt (1-0) notched the victory with a scoreless 10th in which he walked two batters but struck out one.
The Mets led 7-1 in the top of the fifth but Colorado roared back with four runs in their half of the inning to stay in contention.
Wisconsin business offering 'therapeutic cuddling' forced to close
Sign language interpreter at Mandela service called out as fake on Twitter