Patriots wide receiver Wes Welker participated in the team's workouts on Wednesday wearing a knee brace. Welker went through agility drills with the team's receivers and later caught passes from quarterback Tom Brady. He underwent surgery to repair a torn ACL in his left knee on Feb. 2. "It's very impressive to me," teammate Randy Moss said. "I'm a big fan of Welker's, way before he came here, back when he was in Miami. So I can't wait to have him back on the field, whenever that day comes. Sky is the limit, so we'll see what happens."