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08/24/09 8:19 PM ET

Cook gets 'glowing report' on shoulder

MRI shows no structural problems with Rockies ace

DENVER -- The Rockies might be breathing a sigh of relief Monday.

Manager Jim Tracy announced that the MRI result on Aaron Cook's sore right shoulder was completely clean.

"We got just a very, very glowing report that there's absolutely nothing structurally wrong with the shoulder," Tracy said.

Cook, the ace of the staff, hurt his shoulder in the fourth inning Friday against the Giants. He walked Nate Schierholtz on four pitches and motioned to the dugout with his glove that there was something wrong with him.

Tracy said the plan is for Cook to continue treatment until the end of the week. When the team returns from playing the Giants this weekend, Tracy said they will get Cook involved again with some throwing and other activities.

Cook is 10-6 with a 4.47 ERA this season. He's also dealing with the hyperextension of his right big toe. Cook aggravated the injury Aug. 6 backing up third base in a game against the Phillies.

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