Kansas City, Mo. Royals reliever Jimmy Gobble, who allowed 10 runs in one inning Monday against Detroit, was placed on the 15-day disabled list Tuesday because of a stiff lower back.
Gobble established a Kansas City franchise record for runs allowed by a reliever in a game.
"We don't project this to be anything major, but nonetheless it is affecting his performance," Royals manager Trey Hillman said. "I think it is affecting his performance in relation to what people saw him do last year. I'm glad it is not anything that is projected to be too long of a period of time, hopefully."
Gobble was 0-2 with an 11.31 earned-run average in 31 relief appearances. Opponents had a .318 batting average and a .561 slugging percentage against him.
Gobble, a 27-year-old left-hander, was 4-1 with a 3.02 ERA in 2007 and led the Royals in strikeouts in 2006.
Hillman said Gobble would report to Triple-A Omaha, where after a couple of days of rest he would throw off flat ground. He would then throw two or three bullpen sessions before getting into games on a minor-league rehab assignment.
"Hopefully, he'll get back to the point where he feels like he can finish pitches and be more effective," Hillman said. "Obviously, it was bothering him last night."
Right-hander Joel Peralta, who was optioned Monday to Omaha when reliever Leo Nunez came off the disabled list, was recalled. Peralta was 1-2 with a 5.52 ERA in 24 relief appearances in two stints with the club in 2008.