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04/27/10 9:17 PM ET

Chacin to start Sunday for Rockies

Right-hander fills in for De La Rosa, who is on DL

DENVER -- Right-hander Jhoulys Chacin, called up by the Rockies on Tuesday after going 3-0 with a 1.69 ERA in four starts at Triple-A Colorado Springs, will start Sunday at San Francisco, manager Jim Tracy said.

Chacin fills in for Jorge De La Rosa, who was placed on the DL Tuesday with a torn tendon band in his left middle finger.

The Rockies still have not named a starter for Saturday at San Francisco, but it is expected that they'll call up right-hander Esmil Rogers from Colorado Springs.

Right-hander Aaron Cook will start Friday's opener of the three-game set.

In Tuesday's official roster moves, the Rockies:

• Optioned catcher Chris Iannetta to Triple-A Colorado Springs, and placed De La Rosa and right-handed starter Jason Hammel (strained right groin) on the 15-day disabled list.

• Recalled Chacin from Colorado Springs and purchased the contracts of right-handed reliever Juan Rincon and catcher Paul Phillips from Colorado Springs.

• Designated right-handed pitcher Alberto Alburquerque for assignment and transferred right-handed pitcher Greg Reynolds (bone chip in his right elbow) from the 15-day DL to the 60-day DL. The moves opened the roster spots for Rincon and Phillips.

Tracy wants Iannetta to clear mind in Minors

DENVER -- Rockies manager Jim Tracy simply wants to give catcher Chris Iannetta time to clear his thinking, and do it in games.

The Rockies demoted Iannetta to Triple-A Colorado Springs after Monday night. Iannetta had a .133 average and 11 strikeouts in 30 at-bats.

With Miguel Olivo hitting .311 going into Tuesday night's game with the D-backs and having earned regular playing time, Tracy said the best action for Iannetta would be to play regularly in Colorado Springs. Veteran Paul Phillips was called up from Colorado Springs to serve as Olivo's backup.

"Chris Iannetta at times looks very confused as an offensive player," Tracy said. "I see uncertainty in his body language. I see uncertainty in his decision-making process at a time when the pitcher's getting ready to throw a baseball to him and he has to make a decision."

Tracy also detailed some technical issues.

"I see a guy who's working below the ball," Tracy said. "Instead of working down through the ball, he's spending quite a bit of time below the ball and up through it.

"If all that's going on, I don't think you're going to have an opportunity to really solve all of that by hitting off of one of our staff members five out of seven days a week and getting two chances a week to play. I don't think we're going to get it fixed. We needed to be proactive and get him in an arena to give him a chance to fix what's ailing him."

Francis throws simulated game in Tucson

DENVER -- Rockies pitcher Jeff Francis, who hasn't thrown in a game this year because of left shoulder soreness, threw a three-inning simulated game of 15 pitches each inning at the team's training complex in Tucson, Ariz., on Tuesday.

The Rockies went into Tuesday's game against the D-backs -- the second of 12 straight in the National League West -- with three of the projected five rotation members and their closer on the disabled list because of injuries suffered since the start of camp or the start of the season.

Francis missed last season because of arthroscopic shoulder surgery. He was healthy all this spring until suffering tightness after his final Spring Training start. On Tuesday, the club placed two starters on the DL. Jorge De La Rosa has a torn tendon band in his left middle finger, and right-hander Jason Hammel has a right groin strain. Closer Huston Street suffered right shoulder inflammation early in Spring Training.

In addition, right-handed starting prospect Greg Reynolds has been on the DL all season because of a bone chip in his right elbow, the result of being hit by a line drive this spring.

Rockies infielder Omar Quintanilla, who suffered a left knee sprain in Spring Training, played nine innings and reliever Taylor Buchholz, recovering from a Tommy John surgery that cost him last season, threw two innings, totaling 36 pitches, in an extended spring training game in Tucson.

Also, Street threw a 20-pitch bullpen in Tucson on Tuesday and has another scheduled for Friday.

Thomas Harding is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.