The Arizona Diamondbacks concluded their series against the Colorado Rockies disappointingly on Wednesday with a 6-4 loss at Chase Field in Phoenix.

With Wednesday's loss, the Diamondbacks surrendered the series to the Rockies after opening it with a dominant 9-0 win on Monday. What went wrong for them?

Arizona got off to a good start when right-hander Merrill Kelly and the defense retired the Rockies’ batting order in the top of the first. Then, Corbin Carroll hit his 14th triple of the season in the bottom of the inning, and Ketel Marte drove him home with an RBI single, which provided the Diamondbacks with a 1-0 lead.

However, things got ugly quickly for the home team.

Kelly opened the second inning by giving up a walk, and he followed that up by allowing consecutive singles that scored a run for the Rockies and tied the game, 1-1.

Kelly and the defense looked like they were going to get out of the inning after forcing subsequent outs, but then Brett Sullivan took him deep for a three-run home run that capped off a four-run inning for the Rockies and put Arizona in a three-run hole.

Colorado piled on more in the fourth when Kelly allowed a two-run home run to Zac Veen, which put the finishing touches on six unanswered runs administered by Colorado. Kelly got out of the inning and pitched through the fifth before his evening ended.

When Kelly left the mound, he had allowed six hits, six earned runs and two walks over five innings of work. It was another rough outing for the 37-year-old that ended in a losing decision. Kelly is now 8-10 on the year with a 5.11 ERA.

Things were looking bleak for the Diamondbacks heading into the fifth inning, but they showed some life when Gabriel Moreno hit an RBI double.

In the bottom of the seventh, Arizona notched another run after drawing four walks. In the bottom of the eighth, Corbin Caroll hit a solo shot to left field, marking the 100th home run of his career.

Suddenly, what was once a five-run deficit for the Diamondbacks was cut down to two. Arizona demonstrated life, and it looked as if the rally was going to continue when Marte and Tyler Locklear followed up Carroll’s homer with singles, but no more runs got on the board.

The eighth inning ended up being the Diamondbacks’ last and best chance to complete their comeback, but they fell short. Once again, the offense was left to put out a fire caused by underwhelming pitching, and they just did not have the runway to get back in the game.