2007, beginning with the dismissal of 27-year associate head coach Jim Rosborough in April 2007. It is widely believed that Olson had promised Rosborough the head coach position when Olson retired. Olson replaced Rosborough with former Toronto Raptors head coach Kevin O'Neill. On November 4, 2007, Olson was absent from the Wildcats' preseason opener. It was announced 10 minutes prior to the game that he would be taking an indefinite leave of absence. At the time, the university said such absence was not health related. O'Neill took over head-coaching duties during the leave of absence. On December 6, 2007, it was announced that Olson would miss the entire 2007–08 season. The following day, it was announced that Olson had filed for divorce from his wife of four years, Christine. On December 18, Arizona announced that Olson planned to return for the 2008–09 season, and also named O'Neill as Olson's designated successor upon his retirement. Kevin O'Neill publicly stated that he was still relying on a promise to be Lute Olson's successor, and that he would return to UA to be an assistant for the 2008–09 season. However, during an April 2008 press conference in which he appeared visibly annoyed and defensive with reporters, Olson announced that O'Neill would never coach at the University of Arizona again. This marked the second time in a year that Olson had reneged on a promise to promote an assistant coach, following his dismissal of Jim Rosborough. O'Neill later accepted an assistant coaching position with the Memphis Grizzlies of the NBA, and was subsequently the head coach at USC. Arizona athletic director Jim Livengood also said assistant and former Wildcat guard Miles Simon (a key player on Olson's 1997 national championship team) would no longer coach. Retirement from coaching Olson met with the Tucson media during Arizona's annual preseason media day on October 21; in contrast to his April appearance, he seemed in relatively upbeat and positive spirits and ready to coach in 2008. However, Olson did not attend the October 22 practice, which was run by associate head coach Mike Dunlap, and missed a Rotary Club function in Tucson which he attended annually for many years (former Wildcat point guard Reggie Geary, by now a member of the coaching staff, attended the event on Olson's behalf). After a day of speculation fueled by initial reports by Dick Vitale of ESPN, Livengood formally announced Olson's