Undefeated since his return from injury, Trevor Cahill gets the start for the Arizona Diamondbacks on Saturday night in their first game since being eliminated from playoff contention.
The Diamondbacks play the second contest of a three-game set with the Colorado Rockies.
Cahill is 4-0 with a 2.79 earned run average in seven appearances since missing 39 games with a right hip contusion. He is coming off a 2-1 win over the Los Angeles Dodgers on Monday, with the righty charged with a run on two hits and four walks over 5 1/3 innings.
The 25-year-old's surge has improved him to 7-10 with a 4.12 ERA in 24 games (23 starts) this season and he is 2-5 lifetime versus the Rockies with a 5.01 ERA in eight meetings.
Collin McHugh will make his second straight start in place of Jorge De La Rosa, who misses another start due to a sore left thumb.
McHugh started in De La Rosa's place last Monday and allowed a run over five innings of a no-decision versus the St. Louis Cardinals. The right-hander is 0-2 with a 7.94 ERA in five games (3 starts) this year and is still seeking his first Major League win. He is 0-6 with a 7.75 ERA in 13 games (7 starts) over his career.
Arizona led the NL West by 9 1/2 games on June 22, but watched the Los Angeles Dodgers win the division on Thursday night. The Diamondbacks lost for the third time in four games with last night's 9-4 loss.
Tony Sipp failed Arizona starter Randall Delgado, unable to record an out in the sixth while allowing a pair of home runs. Delgado allowed two runs on three hits and two walks over five innings.
"The relievers weren't very effective at all tonight," D'backs manager Kirk Gibson said. "You've got to keep the ball down here in Coors Field, and we didn't do a very good job of that."
Paul Goldschmidt hit his 35th homer of the season for Arizona and has gone deep four times over a 10-game hitting streak.
Charlie Blackmon, Chris Dickerson and Troy Tulowitzki all homered in the Rockies' second straight win.
Even starter Jhoulys Chacin got in on the action, stroking the first home run on his career to put the Rockies on the board. He was a bit erratic on the mound -- walking five batters -- but yielded just two runs on six hits.
"He was able to execute pitches to get out of jams," said Rockies manager Walt Weiss.
The Diamondbacks won 10 of their fist 16 games with the Rockies this season heading into the weekend, a year after they won the 2012 season series, 10-8.