His staying power with the Knicks, a franchise known for upheaval, is all the more impressive. Bill Duffy, one of the league’s top agents, calls Miller “an institution guy” — someone teams should want in their organization in any capacity. When Miller was trying to make the crossover to the NBA, he canvassed friends and contacts for advice and Duffy, who Miller had known since Foster signed with him out of Southwest Texas, told him to be persistent in his hard work. “You gotta get in at whatever level you can get in with an organization,” Duffy said he told Miller. “And he sure did follow through with that.”