DENVER (AP) -The Colorado Rockies placed reliever Ramon Ramirez on the 15-day disabled list with a sprained right elbow Saturday and designated pitcher Matt Herges for assignment.
Colorado called up right-handed pitchers Ryan Speier and Bobby Keppel from Triple-A Colorado Springs.
``We had to fill some voids,'' manager Clint Hurdle said. ``We've got to have some depth.''
Ramirez, who's pitched 5 2-3 scoreless innings over seven appearances this season, was put on the disabled list, retroactive to April 18. He hurt his arm while earning the win against San Francisco on April 17. He's eligible to return May 3.
Speier pitched four innings for the Sky Sox this season and had a 6.75 ERA. Speier hasn't pitched in the majors since Sept. 29, 2005, against the New York Mets.
Keppel was 0-1 with a 4.22 ERA with Colorado Springs this season. He was 0-4 with a 5.50 ERA with Kansas City last season.
``Bobby provides us with depth and obviously Speier has some experience to pitch in a variety of different situations,'' Hurdle said.
Herges was called up from Colorado Springs on Thursday and gave up three earned runs in three innings. Colorado has 10 days to trade, release or outright Herges back to the minors.

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