First baseman Lance Berkman's return from the disabled list may take longer than the club had hoped as he has yet to run faster than a jog since becoming unavailable to the club April 19.

Berkman said he jogged at Busch Stadium on Monday's off day but felt some stiffness in his problematic left calf Tuesday.

Matheny said he had not received any indication Berkman would leave the disabled list when eligible Friday.