SAN FRANCISCO – Jimmy Butler is going through his first training camp with the Warriors after being acquired from the Miami Heat at last February’s trade deadline, but his preseason debut with the team might have to wait. Butler rolled his ankle Thursday and did not practice Friday or Saturday. Coach Steve Kerr is calling Butler’s status a “question mark” for Sunday’s preseason opener against the Los Angeles Lakers at Chase Center. “That’ll be a training staff decision,” Kerr said. The Warriors and director of sports medicine and performance Rick Celebrini will be extremely cautious with the health of players throughout preseason, especially veterans like Butler, Steph Curry, Draymond Green and Al Horford. Curry, Green and Horford are expected to play Sunday.Center Trayce Jackson-Davis also is considered questionable for the Warriors. Jackson-Davis when speaking Saturday at the podium had his right thumb taped up. He says it isn’t anything to worry about. “Thumb’s good,” Jackson-Davis said. “Just a little precaution.” Guard De’Anthony Melton continues to...