David Dahl hit his first career grand slam in Colorado’s seven-run seventh inning, Trevor Story homered to cap a six-run fifth inning, and the Rockies beat the Arizona Diamondbacks 13-2 in Denver on Monday night.
Charlie Blackmon had three hits and German Marquez had another strong outing to help the Rockies pad their lead in the NL West. Colorado now leads Arizona by 3 1/2 games and the Los Angeles Dodgers by 1 1/2 games.
The Dodgers lost at Cincinnati on Monday night.
Eduardo Escobar had three hits for the slumping Diamondbacks. Arizona has lost three straight and eight of the last 10 to slip in the standings.
The Diamondbacks had a 1-0 lead after Escobar’s RBI single in the first, but Zack Godley (14-9) couldn’t get an out in the fifth inning. Ian Desmond led off with a double and scored on Tony Wolters’ single. Marquez reached on a bunt single and consecutive walks gave Colorado a 2-1 lead and ended Godley’s night.
After a groundout scored another run, Story hit Silvino Bracho’s fastball into the Colorado bullpen to make it 6-1. It was his 32nd of the season.
The Diamondbacks scored an unearned run in the sixth, but the Rockies broke it open in the seventh when they sent 12 batters to the plate. Blackmon singled, DJ LeMahieu doubled and Nolan Arenado was intentionally walked.
Dahl followed with his 10th home run on a full count to give Colorado a 10-2 lead. The Rockies added three more runs in the inning.
Marquez (12-9) benefitted from the offensive explosion. He allowed two runs — one earned — on six hits and struck out 11. It was the third straight game he has had double-digit strikeouts.
Marquez has gone 3-0 with 1.69 ERA over his past six starts. He has not allowed more than two runs in an outing during that span.
Godley struggled for the second straight outing. In two September starts he has allowed nine runs in nine innings.