MIAMI -- As Colorado sent another player to the disabled list Wednesday in second baseman Jonathan Herrera, two other Rockies continue to work their way back from the DL.

Left-handed pitcher Jorge De La Rosa, who has been on the DL since April 4, retroactive to March 26, is still recovering from Tommy John surgery to repair the ulnar collateral ligament in his pitching arm, and Rockies manager Jim Tracy said the southpaw is scheduled to throw a bullpen session Wednesday.

Following Wednesday's bullpen session, De La Rosa is set to pitch for Triple-A Colorado Springs on Sunday in Fresno, according to Tracy. The lefty will be on a pitch count of "roughly about 75 pitches," Tracy said.

De La Rosa hasn't pitched in a game in the Majors in a year -- his last outing was May 24, 2011, against Arizona at Coors Field, when he tore his UCL -- and the lefty had a setback last week when he experienced tightness in his left forearm, causing the team to halt his rehab assignment.

While De La Rosa was throwing Wednesday, third baseman Chris Nelson was given a "rest and recovery day" for the Sky Sox as he continues to work his way back from a left wrist injury.

Nelson has started the last two games at third base for Colorado Springs, and went 3-for-4 with a double, an RBI and two runs scored for the Sky Sox on Tuesday. Tracy said Nelson will be used as a pinch-hitter for the Triple-A club Wednesday.

"It's more like a recovery day for him after two full days that have been played," Tracy said.

LeMahieu recalled as Rox place Herrera on DL

MIAMI -- The Rockies placed second baseman Jonathan Herrera on the 15-day disabled list prior to Wednesday's series finale against the Marlins and recalled DJ LeMahieu from Triple-A Colorado Springs.

Herrera strained his right hamstring before the sixth inning of Tuesday's 7-6 loss at Marlins Park, and he was replaced by Marco Scutaro. Rockies manager Jim Tracy said following the game that he expected Herrera to be placed on the DL if the injury was projected to linger more than one or two days.

"It would've been extremely difficult for us to play shorthanded on our bench with some of the different things we have to do with certain lineups we have on the field, so we recalled D.J. and justifiably so," Tracy said.

The Rockies acquired LeMahieu, along with Tyler Colvin, from the Cubs in the offseason in the trade that sent Ian Stewart and Casey Weathers to Chicago. In 43 games for the Sky Sox, LeMahieu hit .315 with eight doubles, two triples, a home run and 26 RBIs. He also led Colorado Springs with 11 stolen bases this year.

"The work that he's done in Colorado Springs, from the Spring Training he had, he has had a terrific start to his season in the Pacific Coast League and deserves the opportunity to be here with us," Tracy said. "We're very, very familiar with him, we know all about him, we know what his capabilities are."

LeMahieu said he was informed of the callup Tuesday night and flew to Miami, arriving to join the team around 1 p.m. MT. He was available to play Wednesday night.

"I'm just here to do the little things, and when my name gets called, I'll be ready," LeMahieu said.

While LeMahieu said he was unsure of his role with the team, Tracy said he will be used as a utility infielder.

"He's played a lot of second, and quite frankly, the best place for him defensively is second base," Tracy said. "That's his best position and he plays it extremely well. That's not to say that he couldn't go over and play shortstop if we had to do so. ... He can definitely do that."

Before off-day, Fowler, Helton get breather

MIAMI -- With a much-needed off-day looming Thursday, Rockies manager Jim Tracy made a couple lineup changes for the team's series finale on Wednesday at Marlins Park.

Eric Young Jr., who Tracy lauded Tuesday afternoon, got the start in center field in place of Dexter Fowler. Fowler slightly turned his ankle in the early innings Tuesday against Miami, but toughed it out until Jason Giambi pinch-hit for him in the eighth and Young replaced him in center field. Tracy said the extra day off should have Fowler hopefully "as good as new" on Friday in Cincinnati.

Fowler's day off gave Young his third start of the season in center field, and he batted leadoff for just the fourth time this year.

"When the opportunities present themselves to use him, it makes sense because of the energy he brings to the top of the lineup there," Tracy said.

Colorado's skipper added that Tyler Colvin would also see the field at some point in the series finale.

"They're all going to participate tonight," Tracy said. "Colvin's going to make his way, and moving the chess pieces around, it's a lot easier to do it from where we're at, as far as the way our lineup is structured right now. ... But you knew as you made the lineup up that they're all going to participate."

First baseman Todd Helton was also given the day off Wednesday, with Giambi making his fifth start of the season. Helton was struggled at the plate in May, hitting just .179 for the month, but went 2-for-5 with an RBI Tuesday to snap an 0-for-12 streak.

Pacheco extends career-best hitting streak

MIAMI -- Rockies third baseman Jordan Pacheco extended his career-best hitting streak to nine games in Wednesday's series finale against the Marlins.

After Miami righty Carlos Zambrano was perfect through the first two innings, Pachecho led off the third with a single that fell out of the reach of a charging Bryan Petersen in left-center field for the Rockies' first hit of the night.

Pacheco's nine-game streak is tied with Pittsburgh's Josh Harrison -- who recorded a hit in the Pirates' loss to the Mets earlier in the afternoon -- for the longest active streak in the National League. The pair entered the day tied for the second-longest active streak behind Milwaukee's Ryan Braun, who had his 11-game streak end with a 0-for-4 performance Wednesday afternoon.

Since taking over at third for an injured Chris Nelson, Pacheco has been on a tear at the plate. Following his third-inning at-bat, he is batting .364 (12-for-33) during his hitting streak, with a homer, two doubles, five RBIs and six runs scored.

Rockies manager Jim Tracy attributed Pachecho's offensive tear to a higher comfort level on defense, where he has filled in nicely for Nelson.

"I think part of the calming effect is the peace he has with himself and the relaxation he has with himself playing defense," Tracy said. "It's like, 'OK, I'm going to go out and play defense for three outs and make the plays I have to make and then I get a chance to hit.' Peace of mind.

"The offensive player that we know we have is coming out as a result of that."