Amid their unsuccessful attempts to trade for Butler, I’m told Houston made a run at Frank Vogel, the former Indiana and Orlando coach, to join Mike D’Antoni’s staff to help fill the void created by the brief retirement of Jeff Bzdelik, the veteran defensive guru. But the Rockets ultimately did manage to coax Bzdelik out of retirement after more than a month of trying. Bzdelik announced shortly before training camp that he was leaving the team to spend more time with family.