Steve Fisher put his arm around Kawhi Leonard’s shoulder and asked him to look around at a packed Viejas Arena, where 12,414 fans were standing. “This is your legacy my friend,” the former San Diego State coach told his most prized Aztecs recruit. Returning to the place where he won two conference titles, reached a Sweet 16, worked his way into becoming an NBA lottery pick and even learned how to surf, Leonard watched his No. 15 become the first jersey in program history to be retired by San Diego State on Saturday night.