[caption id="attachment_2276" align="alignleft" width="150" caption="Photo by Eric Molina"][/caption] Keith Smart, the Warriors' top assistant, is publicly playing the part of timid understudy as the team awaits the full-time return of head coach Don Nelson from a bout with pneumonia. What Smart is doing in the locker room and on the court, however, might be proving that he is ready for a leading role. He is widely considered the heir apparent to Nelson, though no one confirmed that verbiage is in writing. FanNation