Three months after fracturing his right hand that abruptly ended his season, New Orleans Pelicans guard Austin Rivers is back doing basketball work. Pelicans Coach Monty Williams said Thursday that Rivers’ cast has been removed and though he’s working, he’s being monitored. ``He looks really good,’’ Williams said. Rivers, who could not be reached for comment Thursday, is among four Pelicans’ players, which includes Eric Gordon, Greivis Vasquez and Jason Smith, that are spending this offseason trying to recover from injuries sustained during the regular season. Rivers, who was the 10th overall pick in last year’s NBA draft, was forced to miss the final 23 games of the regular season after requiring surgery in March on his hand. The injury occurred during a March 6 game against the Lakers after Rivers was going for a steal and jammed his hand on Vasquez body. Despite finishing the season averaging 6.2 points and 2.1 assists, Rivers had made progress before the injury occurred. Two weeks ago, when Williams give his first initial injury update on Rivers since the season ended, he said they had been really cautious because he’s like Dennis the Menace because it’s tough to keep him out of the gym from working whether he’s hurt or not. Appearing to be on schedule with his recovery from his hand injury, Rivers is expected to be ready when the Pelicans open summer league play next month in Las Vegas.