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08/05/11 9:17 PM EST

CarGo expected to return on Saturday

DENVER -- Help is on the way for the Rockies' offense.

Outfielder Carlos Gonzalez went 2-for-5 with two singles during a doubleheader for Triple-A Colorado Springs on Thursday. Gonzalez, who is on the 15-day disabled list with inflamed ligaments in his right wrist, will play nine innings in right field on Friday and is expected to return to the Rockies when they play the Nationals on Saturday.

"We want him to play some right field because that's the area he's been in the least," Rockies manager Jim Tracy said.

Gonzalez originally injured the wrist on July 3 while running into the center-field wall after making a catch. He re-injured it after an awkward swing on July 21, sending him to the DL for the first time in his career.

In other injury news, first baseman Jason Giambi ran on the field and took batting practice before Friday's game, as he continues to recover from a strained left quadriceps that has had him on the 15-day DL since July 27.

"He's getting there," Tracy said. "I'll find out after [batting practice] today how that went and how we're going to progress with him moving forward."

Giambi, who was involved heavily in trade talks before his injury, has been a solid contributor for the Rockies this season. In a reserve and pinch-hitting role, he is hitting .260 (25-for-96) with 10 home runs and 24 RBIs.

Giambi will be eligible to return from the DL during the middle of the Rockies' upcoming road trip to Cincinnati and St. Louis.

Cook expected to start against Nats Sunday

DENVER -- Aaron Cook has experienced no lingering effects from the neck muscle spasms that forced him to leave his last outing in the fourth inning. As a result, the right-hander is expected to make his next scheduled start on Sunday against the Nationals.

Cook, who was slated to throw a light bullpen session on Friday, told manager Jim Tracy on Thursday that he is feeling fine.

"I haven't heard anything to the contrary, so I think we're in a good spot," Tracy said.

In his start against the Phillies on Tuesday, Cook felt the spasms in his neck after quickly reacting to avoid a Raul Ibanez line drive up the middle.

"It's one of those things that's more scary than anything," Cook said after the game. "When it happened, it just kind of locked up and I lost a little strength in my arm."

Nelson thriving in second stint with Rox

DENVER -- Rockies infielder Chris Nelson didn't spend much time sulking after being optioned on July 1 to make room for second baseman Mark Ellis. Instead, Nelson went to Triple-A Colorado Springs intent on proving himself capable of contributing at the Major League level.

After a scintillating July, in which he hit .431 with four home runs and 19 RBIs for the Sky Sox, Nelson is making the most of his second stint with the Rockies this season. Entering Friday's action, he is hitting .381 (8-for-21) with four RBIs in seven games since his callup on July 27.

With Ellis mired in a 1-for-26 slump, Nelson -- who made his second straight start at second base on Friday -- has filled in with welcome production that Rockies manager Jim Tracy said has come from a more disciplined approach at the plate.

"He is a very, very competent offensive player for us when he's thinking middle of the field to right-center," Tracy said. "Chris Nelson starts to get himself into trouble offensively when he gets into pull mode."

Nelson displayed the kind of improvement that Tracy has lauded during the Rockies' 6-3 win over the Nationals on Thursday, when he hit two sharp singles through the right side of the infield.

"That's what makes him good," Tracy said. "Realize that and stay within that framework, and don't come out of what it is that makes you a good player at this level. That's what [Nelson] has to understand and continue to go from there."

Blackmon still unable to put weight on left foot

DENVER -- Rockies outfielder Charlie Blackmon is still unable to put weight on his left foot after fracturing it during a game in Atlanta on July 7.

Blackmon, who had a screw surgically inserted in the foot, said he is scheduled to see a doctor "in a week or two to get some follow-up X-rays."

"I'm pretty sure they'll be able to look at the X-rays and give me a more accurate timetable," Blackmon said.

Blackmon said that he does not know whether he will be able to make a return to the Rockies this season.

"I don't want to say I'm officially done for the season, but I'll probably have a better idea once I go to a doctor," he said.

The injury derailed an impressive rookie campaign for Blackmon, 25, who hit .255 with a home run and eight RBIs in 27 games. He also stole five bases.

Nick Kosmider is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.