The Dodgers have their biggest lead in the division in 35 years, so they can afford to give struggling Edinson Volquez a shot to prove he can once again be an effective starting pitcher.
Volquez signed with the Dodgers last week after being released by the Padres, and he will make his first start with Los Angeles on Wednesday night as the Dodgers go for a three-game sweep of the Rockies at Coors Field.
Volquez has not enjoyed much success in his career at Coors Field, where he is 1-4 with an 8.39 ERA. In three starts at the ballpark this season, Volquez is 0-2 with a 14.92 ERA and has allowed 29 hits, including two home runs, in 12 2/3 innings. The right-hander is 0-4 with a 13.08 ERA against Colorado this year.
Still, the Dodgers want to see if pitching coach Rick Honeycutt can work some of his magic with Volquez, who had a 6.01 ERA this season with San Diego but won 17 games with the Reds in 2008. Honeycutt has already helped Zack Greinke and Carlos Marmol refine their deliveries this year, and he worked on mechanical adjustments with Volquez to keep him on line with the plate, rather than spinning off toward first base.
"I will be more comfortable with my delivery," Volquez said. "We worked one hour, let's see what happens. On the video we saw different mechanics. We worked a lot on hiding the ball. You can tell the difference with my hands. We'll see if I can do what they want me to do."
The Dodgers have won six straight games and lead the National League West by 13 1/2 games over Arizona, the club's largest advantage since 1977. Los Angeles has won 17 of its past 22 series.
The Rockies, meanwhile, saw their streak of three straight series wins end with Tuesday's 7-4 defeat. Colorado has dropped three games in a row to fall 10 games under .500.
Jorge De La Rosa will take the mound for the Rockies looking for his 16th win of the season, which would tie a career high. The left-hander is 1-1 with a 6.55 ERA in two starts against the Dodgers this season.
De La Rosa has been great at Coors Field, with a 2.74 ERA in 13 outings this year. He's pitched through a bruised thumb for much of the season, something that won't fully heal until the offseason. "It's a little sore," De La Rosa said. "I just have to keep pitching and help the team to win as much as I can."
Dodgers: Puig dealing with knee discomfort
Yasiel Puig didn't play on Tuesday after coming out of Monday's game in the sixth inning, the result of a strained right knee.
"I'm not going to put him out there until he's ready to go full speed," said manager Don Mattingly. "He's not the kind of guy that plays half speed."
Puig said he has played through occasional discomfort behind the knee for the past month, but it worsened during Monday's game. Still, Mattingly said the club does not believe the injury is serious.
In 80 games with the Dodgers, Puig is hitting .351 with 19 doubles, 14 home runs, 32 RBIs and 55 runs scored. When the outfielder swings at the first pitch, he's hitting .596 (34-for-57) with seven homers.
Rockies: Fowler returns to lineup
Dexter Fowler was back in center field for the Rockies on Tuesday after missing six games with a bruised left knee.
Fowler went 0-for-2 with two walks and a strikeout in his first action since Aug. 26, when he injured his knee trying to steal second in the first inning against the Giants.
• The Rockies promoted right-handed pitchers Mitchell Boggs, Manuel Corpas, Collin McHugh and infielder Ryan Wheeler from Triple-A Colorado Springs on Tuesday, taking advantage of expanded rosters.
• Dodgers first baseman Adrian Gonzalez is 12-for-32 (.375) lifetime against De La Rosa, with two doubles, three homers and nine RBIs.
• Rockies catcher Wilin Rosario is 8-for-18 (.444) in his career against Volquez, with two homers and nine RBIs.
Austin Laymance is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.