The Cardinals have taken rehabbing pitching Mark Mulder off the mound until at least Monday due to stiffness that followed his recent side work at Shea Stadium. Mulder, recovering from surgery to repair a partial thickness rotator cuff tear, confirmed that he experienced some discomfort in the days after his throwing. He has since thrown long toss off flat ground but was told to back off from throwing downhill. Said Mulder, "I was just a little tight. It?s not anything I haven?t had. It?s just a little more tight than normal." The lefthander emphasized he did not feel any tightness until long after Monday?s side session. "I threw and it was fine. Wednesday I played catch and it was tight. I couldn?t get it back to where I needed it to be." Pitching coach Dave Duncan acknowledged Mulder had experienced a "minor setback" but said he was not alarmed. The Cardinals and Mulder have meanwhile refrained from projecting his return after initially hoping last winter that he could return in late July or early August.