His son, Kevin, took advantage of a new NCAA rule, called Proposal 2005-54, before the 2006–2007 season to transfer from Arizona State and immediately play for his father at UNLV without sitting out one year. The controversial rule has been repealed for the next season due to the "unintended consequences" of allowing players with undergraduate diplomas to immediately begin playing for another school without sitting out for any time.
On April 1, 2011, sources confirmed that Kruger had accepted the head coaching position with the Oklahoma Sooners, replacing the fired Jeff Capel. Kruger's new Oklahoma Sooners compensation package purportedly exceeds $2.2 million annually. Despite his success, he has not been immune to criticism, having won just one regular season conference championship in his lengthy college coaching career (Illinois tied for the Big 10 title in 1997-98). However, Kruger generally enjoys a positive reputation overall.
On November 30, 2012, Kruger earned his 500th career head coaching victory as his Oklahoma Sooners beat Northwestern State 69-65 in Norman.
On March 17, 2013, Kruger became the only head coach in Division I history to lead five programs to the NCAA tournament when his Sooner team was named a 10 seed in the event's South region.
On March 20, 2015, Kruger became the only head coach in Division I history to win an NCAA tournament game with 5 different programs.
National champion Postseason invitational champion Conference regular season champion Conference regular season and conference tournament champion Division regular season champion Division regular season and conference tournament champion Conference tournament champion