The left-hander, rehabbing from rotator cuff surgery last September, threw off a mound for the first time since then on Tuesday. The team has been hopeful of him returning around the All-Star break, but after the session Mulder was more pessimistic, saying there's a chance he won't be back until next season.
"It could be August, it could be September, it could be April," Mulder said. "I couldn't begin to tell you when it might be."
The Cardinals were more optimistic. Manager Tony La Russa didn't see the session but said pitching coach Dave Duncan was impressed even though Mulder told the manager it "wasn't one of his best."