Saarland, 10th-place finisher as the co-second choice in the Kentucky Derby, underwent surgery Monday to remove a chip fracture from the front of his left front fetlock joint, according to Dr. Larry Bramlage.The Unbridled colt is expected to be out of training until summer, Bramlage said.Bramlage said the injury was detected by Dr. Mark Cheney of the Rood & Riddle Clinic, who found "marked fluid" in the fetlock joint when he examined the colt on the Sunday morning following the Derby. "It was surgically removed to resolve the inflammation and allow the horse to resume training without the irritation to the joint," Bramlage said. "The amount of inflammation and debris found at surgery indicates an acute inflammatory response severe enough that the injury certainly could have accounted for the horse's sub-par performance in the Kentucky Derby."Trained by Shug McGaughey, Saarland had won the Remsen Stakes (gr. II) as a 2-year-old of 2001, and this year was second in the Gotham Stakes (gr. III) and fourth in the Wood Memorial (gr. I).