Norm Bellingham is leaving the U.S. Olympic Committee after more than four years as chief operating officer.

Bellingham, a former Olympic kayaker who was one of the few executives to stay in place during the USOC's recent turnover at the top, had previously served on the board of directors and on the Athletes' Advisory Council.

Bellingham was a key player in trying to develop the USOC's Olympic TV network — a plan that didn't work out — but was also central in the difficult negotiations that kept USOC headquarters in Colorado Springs for the next 30 years.

He applied for the open CEO spot that went to Scott Blackmun and stayed on for more than a year after Blackmun got the job. The USOC hasn't made immediate plans to choose Bellingham's successor.