RHP Rubby De La Rosa was released to make room on the 40-man roster. The Diamondbacks hope to re-sign De La Rosa, who underwent Tommy John surgery for the second time Aug. 21. In nine relief appearances for Arizona, De La Rosa was 0-1 with a 4.70 ERA.

RHP Rubby De La Rosa (right elbow) underwent Tommy John surgery Tuesday. It was the second ligament replacement operation for De La Rosa, who also had the procedure done in August 2011. De La Rosa battled elbow troubles throughout 2016, when he was limited to 13 games (10 starts), and dealt with elbow and shoulder woes while going 0-1 with a 4.70 ERA in just nine relief appearances for the Diamondbacks this season. He is expected to miss all of 2018 while recovering from the operation. De La Rosa, 28, is unsigned beyond this year and is a candidate to be non-tendered this winter.

RHP Rubby De La Rosa will undergo a second Tommy John surgery, Arizona manager Torey Lovullo announced prior to Thursday's afternoon game against the Houston Astros. De La Rosa will need the surgery to repair the ulnar collateral ligament in his right elbow. The 28-year-old had his initial surgery performed in 2011 near the tail end of his rookie season with the Los Angeles Dodgers. De La Rosa posted an 0-1 mark with a 4.70 ERA in nine appearances (7 2/3 innings) with the Diamondbacks this season. In his last outing on Aug. 1, he allowed a homer and struck out two in one inning of a 16-4 loss to the Chicago Cubs.

RHP Rubby De La Rosa was optioned to Triple-A Reno on Friday. He's 0-1 with a 4.70 ERA over nine relief appearances for the Diamondbacks. He struck out 12 and walked four over 7 2/3 innings.

RHP Rubby De La Rosa was reinstated from the 10-day disabled list Wednesday, a little earlier than was first expected. The plan was for him to make a fourth rehabilitation appearance Wednesday at Triple-A Reno, but that was altered after RHP J.J. Hoover had a terrible outing Tuesday in relief. De La Rosa pitched a scoreless ninth inning as Arizona won 10-3. De La Rosa went on the disabled list July 6 with shoulder inflammation after having a 5.40 ERA in six relief appearances. He signed a minor league contract with the team after appearing in only 13 games last season with Arizona because of a right elbow injury.

RHP Rubby De La Rosa continues to mend at Triple-A Reno as he recovers from a bout of shoulder inflammation. He pitched on Friday, and he's scheduled to pitch again on Wednesday. "Then we'll see where he's at," manager Torey Lovullo said. "The areas of concern are being monitored and he said everything felt fine." De La Rosa was 0-1 with a 5.40 ERA in six appearances, often topping out in the high 90- mph range, after being called up from Reno in late June. He last pitched for Arizona on July 5.

RHP Rubby De La Rosa (shoulder inflammation) made his third rehab appearance for Triple-A Reno?on Saturday night, and manager Torey Lovullo was pleased with what he heard. "(He) came out of it very good. I know the linescore didn't look great but the stuff was very good," Lovullo said. "And all reports indicate that he came out of it healthy. I'm not sure what the next step is, we just have to see how he's feeling." De La Rosa last pitched for Arizona on July 5.

RHP Rubby De La Rosa (right shoulder inflammation) pitched a scoreless inning Saturday in his first rehab outing in the rookie Arizona League, needing just 11 pitches. He has been on the 10-day disabled list since July 6.

RHP Rubby De La Rosa (right shoulder inflammation) began a rehab assignment Saturday. De La Rosa was 0-1 with a 5.40 ERA in six games, last pitching for Arizona on July 5.

RHP Rubby De La Rosa (right shoulder inflammation) is scheduled to make a rehab appearance in the rookie Arizona League on Saturday after going on the 10-day disabled list July 6. He is 0-1 with a 5.40 ERA in six relief outings with Arizona this season and 0-1 with a 2.35 ERA in 14 games for Triple-A Reno.

RHP Rubby De La Rosa (shoulder inflammation) will not be rushed in his return. De La Rosa missed the final four months of 2016 with right elbow inflammation and was given a stem cell injection in September in lieu of a second Tommy John surgery. "Given the nature of his injuries and how hard he had worked, it wasn't anything we wanted to force," manager Torey Lovullo said. "We didn't want to put him in a situation where he was going to go too hard tool quickly and wind up hurt again." De La Rosa was promoted from Triple-A Reno in late June and has been scored upon once in six relief appearances.

LHP Rubby De La Rosa was placed on the 10-day DL with soreness in his pitching shoulder and RHP Jake Barrett was called up from Triple-A Reno. De La Rosa had a walk and two strikeouts in a scoreless seventh inning Wednesday in the 1-0 loss to the Dodgers, but reported soreness in his shoulder on Thursday, manager Torey Lovullo said.

RHP Rubby De La Rosa struck out two and gave up a triple in a scoreless inning of relief. Activated Friday, De La Rosa has struck out three of the five batters he has faced in two games while touching 99 mph on the stadium radar gun. "He has elite stuff," manager Torey Lovullo said. "Low fuzz with a slider that's swing-and-miss."

RHP Rubby de la Rosa was back in the Arizona dugout Friday night. His tenure with the team appeared to be over after Arizona didn't offer him a contract following last season. The team made that move after he was limited to 13 games, including 10 starts in 2016, going 4-5 with a 4.26 ERA and 54 strikeouts. But he received a stem cell injection in his elbow at the end of last season and subsequently was offered a minor league contract by the Diamondbacks. He responded by going 0-1 with a 2.35 ERA with 23 strikeouts and only four walks in 15 1-3 innings at Triple-A Reno, where his final eight appearances were scoreless. De La Rosa was called up Friday and came on in the seventh inning to strike out Aaron Altherr, the only hitter he faced. "It was great to see Rubby come in there -- after everything he's been through -- to come in and get a strikeout there and keep it at 1-0," starting pitcher Patrick Corbin said. "It was nice to see."

RHP Rubby De La Rosa gave up a wind-blown home run and was clocked between 96-100 mph in his first appearance at Triple-A Reno on Thursday after making three scoreless appearances for Class A Visalia while recovering from an oblique injury suffered in spring training. "He's going to have some more outings and is going to continue to gain strength and endurance," manager Tory Lovullo said. De La Rosa signed a minor league contract in the offseason and would be a candidate to be added to the parent team if bullpen help is needed. "He needs to continue to go and perform. He's in a very good place."

RHP Rubby De La Rosa (elbow) was 96-99 mph with his fastball Friday night when he threw one scoreless inning for the second time with Class A Visalia. De La Rosa received two rounds of stem cell therapy over the winter in hopes of avoiding Tommy John surgery. Last season, De La Rosa was 4-5 with a 4.26 ERA for the Diamondbacks in 13 games, 10 starts.

RHP Rubby De La Rosa threw 17 pitches in one inning of an extended spring training game at the D-backs' spring training complex in Scottsdale, Ariz., on Monday. "He threw the ball very well," manager Torey Lovullo said. "The velocity was well above average." De La Rosa is on the minor league disabled list due to a sore right elbow.

RHP Rubby De La Rosa (elbow) threw live batting practice at the D-Backs' training facility in Scottsdale on Saturday morning. "It was fantastic from what I read" on the reports, manager Tory Lovullo said.

RHP Rubby De La Rosa (sore right elbow) was given a platelet-rich plasma treatment in mid-summer after experiencing soreness in his Tommy John-repaired elbow. Following rest and rehab, he returned to the mound for two appearances in September but felt tightness again, causing him to sit out the final two weeks. If rest and recovery this winter do not help, a second Tommy John operation is an option.

RHP Ruby De La Rosa's arm problems was one of the disappointing aspects of the Diamondbacks' pitching staff. The Diamondbacks will have to decide whether to keep trying him as a starting pitcher or put him in the bullpen. He could get a shot at the closer role. "We have to figure out where this arm is going to go and where he's going to fit into the club next year," manager Chip Hale.