Milwaukee Brewers first baseman Corey Hart has been cleared to begin intensifying his rehab program after an MRI taken Friday showed sufficient healing, according to Adam McCalvy of While this is certainly good news and could mean Hart is ultimately able to return sooner than initially expected, manager Ron Roenicke said the Brewers will continue to operate under the original four-month recovery timetable. This would put the slugger back in Milwaukee's lineup by the end of May. Hart continues to recover from offseason knee surgery. He underwent a procedure in late January to repair torn cartilage and address an imperfection in his knee joint. Bleeding was induced by the surgeon to promote bone healing.