On Sunday afternoon against the Rockies at Chase Field, rookie Chase Anderson will have another opportunity to make his case to be a part of the D-backs' 2015 rotation.
Anderson has a 3.90 ERA on the season, but the 26-year-old has struggled recently, going 0-2 with a 9.00 ERA in his last three starts and posting a 5.40 ERA in August after a 2.78 ERA in July.
Over his last two outings, Anderson has walked a combined seven batters in only seven innings. The free bases have helped lead to 11 runs (10 earned) in those two starts.
"I felt good going into the game, my command was coming back to my fastball in the third and fourth innings, so no real rhyme or reason. Just got to work on it," Anderson said after his last start, on Aug. 24 against the Padres.
"He was a little wild and not throwing strikes. When a guy is like that, you're looking for a fastball to hit," Padres catcher Yasmani Grandal said.
As the Rockies try to climb past the D-backs and fight their way out of the basement of the National League West, they'll give the nod to a pitcher who also has something to prove. Jorge De La Rosa has allowed three earned runs or less in eight of his last 10 starts, but he is dealing with a left thumb contusion that forced him to leave early from his last start. The injury is reminiscent of the thumb issues that prematurely ended his 2013 season.
"He's pitched with it a lot, but I think it was hurting pretty good this time," Rockies manager Walt Weiss said. "I don't have any major concerns right now. We've seen this before with Jorge with his thumb. Hopefully it's just a bruised thumb again and he'll be fine."
De La Rosa is 0-2 with a 5.19 ERA in three games against the D-backs this season, walking as many hitters (six) as he's struck out.
Rockies: Weiss says Kahnle looks good in BP session
Reliever Tommy Kahnle took a step toward returning to the Rockies' bullpen, throwing a live batting-practice session on Saturday before the game against the D-backs.
Kahnle has been on the 15-day disabled list with right shoulder inflammation since Aug. 16.
"He looked good," Weiss said. "Ball's jumping out of his hand like it usually does."
Kahnle has become a key part of the Rockies' bullpen in his first Major League season, pitching in 47 games with a 3.43 ERA.
Weiss didn't say when the Rockies plan to activate Kahnle, as he said the right-hander would get "at least a day or two."
D-backs: Hudson nears return, to be used as a reliever
The next time Daniel Hudson takes the mound it will be in the big leagues.
The right-hander finished up his rehab assignment Friday night by tossing a scoreless inning for Triple-A Reno, and he is expected to rejoin the D-backs on Monday when rosters expand.
D-backs manager Kirk Gibson said Hudson will throw an inning of relief either Tuesday or Wednesday against the Padres in San Diego.
Hudson was a starter for the D-backs before suffering a torn ulnar collateral ligament on June 26, 2012, in Atlanta.
Just days away from being activated last June, Hudson suffered another tear of the ligament and was forced to undergo a second Tommy John procedure.
• D-backs closer Addison Reed notched his 100th career save on Friday night.
"I thought [on Friday] he threw the ball about as good as we've seen him throw it in a long while if not all year," Gibson said. "Lot of life on his fastball."
• Colorado's Brandon Barnes leads the Majors with 17 pinch-hits.
Erik Bacharach is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.