The Spurs' easy-going, philanthropic Mr. Citizenship once again transformed into the ruthless, game-on-the-line, give-me-the-ball mercenary Friday night. Smith buried all six of his 3-pointers ? all but one of which came after Cleveland took the lead late in the third quarter ? to lead the Spurs to a 105-91 win over the Cavaliers in front of 19,222 at the Alamodome.