Mayhew's association with North Harbour Rugby began in 1985, serving as the union's doctor since its inception. He was honoured as a life member of NHRU in 2015.
Mayhew served as the All Blacks' team doctor from 1988 to 2004, attending 131 tests and over 200 matches, including four World Cup campaigns. He was also involved with the Warriors after his time with the All Blacks came to an end.
His most high-profile player that required medical advice was the late Jonah Lomu. The winger was diagnosed with nephrotic syndrome in 1995 and Mayhew was one of the very few people aware of Lomu's chronic health issues from the start.
Mayhew became a close family friend and served as a pallbearer at Lomu's funeral in 2015.
In 2016, Mayhew was appointed an Officer of the New Zealand Order of Merit for his services to sports medicine.
That same year, Mayhew was lucky to survive a heart attack at his local gym caused by undiagnosed viral cardiomyopathy which had damaged his heart. He was fitted with an internal defribrillator. — RNZ/APL
