Aaron Cook was placed on the 15-day disabled list Saturday with a right shoulder strain, a potential blow to the Colorado Rockies’ playoff hopes.
An All-Star last season, Cook is 10-6 with a 4.47 ERA in 25 starts. To replace him on the roster, Colorado purchased the contract of right-handed reliever Matt Herges from Triple-A Colorado Springs.
The Rockies began the day leading the NL wild card race by one game over San Francisco.
Cook was hurt during Friday night’s 6-3 loss to the Giants. Rockies manager Jim Tracy said Cook felt something in his shoulder during a four-pitch walk to Nate Schierholtz to start the fourth inning. Cook motioned to the dugout after the walk and was taken out after being looked at by trainer Keith Dugger.
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Tracy said Cook will have an MRI on Monday and the early signs are encouraging that it won’t be a serious injury.
The Rockies signed Herges on July 17, eight days after he was released by Cleveland, where he was 2-1 with a 3.55 ERA in 21 appearances.
Tim Wakefield will replace struggling Brad Penny in the Red Sox rotation. Wakefield (11-3) last pitched for Boston on July 8 and made his second rehab start Friday night since going on the disabled list July 21 with a strained lower back, left hamstring and left calf. … Reds manager Dusty Baker says third baseman Scott Rolen will be activated off the 15-day disabled list and start today against Pittsburgh. Rolen sustained a concussion when he was hit in the head by a pitch Aug. 2. … The Cardinals placed right-handed pitcher Kyle Lohse on the 15-day disabled list with a strained left groin. … Pirates shortstop Ronny Cedeño will be out until at least Tuesday with a slight fracture in his right pinky finger. Cedeño is hitting .261 with four homers and 12 RBI in 19 starts since being acquired in a July 29 trade with Seattle. … Former big league closer Armando Benitez and the Astros have agreed to a minor league contract. Benitez, 26, a major league All-Star in 2003 and 2004, was pitching for the Newark Bears in the independent Atlantic League. He was 1-0 with 16 saves.