Just a year after losing defensive-minded assistant coach Tom Thibodeau  and watching him take the Bulls to the Eastern Conference finals, the Celtics  and head coach Doc Rivers  might be posting the position on the NBA’s “Help Wanted” list for a second straight season.
Thibodeau’s replacement, Lawrence Frank , went through a second round of interviews with the Rockets on Monday for the head coaching position left vacant in Houston by Rick Adelman, according to Houston’s local FOX affiliate . He is reportedly one of three finalists for the job, along with Mavericks assistant coach Dwane Casey and Celtics Hall of Famer Kevin McHale .
This past season, Frank did an admirable job as Rivers’ assistant coach, leading the Celtics to a No. 1 ranking in points allowed (91.1) and No. 2 ranking in defensive rating (100.3 points per 100 possessions). Under Thibodeau in 2009-10, the C’s ranked fifth in both points allowed (95.6) and defensive rating (103.8).
Last serving as a head coach in 2009, Frank totaled a 225-241 record (.483 winning percentage) with the Nets  for six-plus seasons.