Chase Utley smiled. Often. He smiled on the field as he took ground balls alongside Freddy Galvis. He smiled around the batting cage in between swings. He smiled as he chatted with reporters – and even asked the guys with the notebooks how they were doing. Utley has spent the last three weeks rehabbing his sore knees with Phoenix-based physical therapist Brett Fischer. The 33-year-old second baseman, out of sight since spring training, joined his Phillies teammates for pregame workouts before Monday night's game against Arizona. Utley took batting practice and fielded ground balls. Both exercises carried significance. Utley said that his knees did not hurt when he hit. He couldn't say that since last season. He felt discomfort in his left knee while taking ground balls, but the pain was less than he felt during spring training, when he had to stop taking ground balls early in camp.