Rehabbing his career Player introductions at the final Citizens Bank Summer Caravan stop produced an awkward moment. Walter McCarty and Raef LaFrentz were the featured guests for the free basketball clinic at the Cambridge Family YMCA late last week. McCarty's presence yielded chants of  quot;Walter, Walter quot; from the crowd of 125 kids. LaFrentz left the young fans wondering,  quot;Who is he? quot; The projected ...