Randle has seemed angry all year, battling with fans through his “thumbs-down’’ gesture, battling with referees, battling with assistant coaches, battling with Johnson when the Knicks had all the momentum and were on the verge of snapping their six-game slide. He has been a mystery wrapped in a riddle. Some might suggest he’s jealous of Barrett’s rising stardom. The last six road games, Randle hasn’t participated in the starting lineup introductions, preferring to stay in the back to warm up. By doing so, Randle misses out on the traditional group huddle after the lineups are called. (He participates during home games).