Whetton continued to play for the All Blacks until their semi-final defeat to Australia at the 1991 World Cup. He played for Auckland in 1992, and finished with 150 matches for his province. Following retirement from rugby in New Zealand, he was a player coach for Kobe Steel between 1996 and 1999. He was a commentator for New Zealand's TV3 network during their coverage of the 2007 Rugby World Cup. Whetton is currently part of the Solid Gold (radio) breakfast team and is involved in the business of sporting signage. In his personal life, Whetton is married with two daughters.