PHOENIX -- Only days before the season opens is a little late to be fixing a delivery, but at least George Sherrill is confident his is about to be fixed.

And the Dodgers need him, because the uncertain status of Ronald Belisario and Hong-Chih Kuo has already changed the makeup of the bullpen, which was one of the team's most potent weapons last year.

But if you've been looking for Sherrill in recent games, you haven't seen him. While manager Joe Torre has been testing most of his relievers in back-to-back games this week, Sherrill hasn't pitched since last Friday and won't pitch again until this Friday.

Instead, he's been throwing bullpen sessions with pitching coach Rick Honeycutt, trying to incorporate corrective action after spotting several mechanical flaws believed responsible for a lack of command and velocity.

"Watching video and making these adjustments seems to have helped a lot," said Sherrill, who has a 5.06 spring ERA with six walks in 5 1/3 innings. "I've gotten a little zip back from the way I've been throwing all spring."

Sherrill said he was turning his landing foot too early and losing torque in his release. The adjustment he made was less of a leg swing as he starts his delivery.

"It still feels a little wierd, because it's just not a habit yet," he said.

Monasterios eyes bullpen spot

TUCSON, Ariz. --Carlos Monasterios, a Rule 5 pick thought to have secured a spot on the Dodgers' 11-man pitching staff, has been shaky in three of his last four outings. As a Rule 5 pick, if Monasterios doesn't make the Dodgers Opening Day roster, he must be offered back to the Phillies.

Monasterios allowed three baserunners in his one inning of relief work Tuesday at Tucson against the Rockies, escaping without allowing a run by getting a comebacker double-play and a strikeout.

"He looked liked he forced it a little bit and then got it together on that double-play ball," manager Joe Torre said.

In his previous appearance, Monasterios was relieved after loading the bases with two outs. The previous day, he came in with two out in an inning and recorded a strikeout. Prior to that, he started and went four innings, allowing three runs and four extra-base hits.

Monasterios, a 24-year-old right-hander from Venezuela, has pitched only two games above Class A and was primarily a starter until last year, when the Phillies converted him to relief. He seems to have strong support from the front office that drafted him.

"He exhibits no fear," general manager Ned Colletti said before Tuesday's game. "He has a big league changeup right now. Is it a bit of a stretch [jumping to the big leagues]? Sure it is. He was successful in the Venezuela Winter League, and that means something to me."

That's where the Dodgers found Ronald Belisario last year.

Dodgers place Repko on waivers

TUCSON, Ariz. -- The Dodgers have placed outfielder Jason Repko on waivers as they attempt to free up spots on their 40-man roster, FOXsports.com reported. The Dodgers could not confirm the report.

Repko, 29, is a defensive specialist outfielder who has been passed on the depth chart by Xavier Paul. His chances of making the club also took hits when the Dodgers signed free-agent outfielders Reed Johnson and Garret Anderson.

Repko could be claimed by another Major League club or, if he clears waivers, could be outrighted to the Minor Leagues by the Dodgers, who need roster spots because they are likely to add non-roster players Anderson, Jeff Weaver, Nick Green, Ramon Ortiz and possibly Russ Ortiz or Justin Miller to the Opening Day roster.

They will free up one roster spot with the sale to Japan of pitcher Eric Stults and another by placing reliever Ronald Belisario on the restricted list. Another spot became available when they returned Rule 5 pick Armando Zerpa to Boston.