He attended Westlake Boys High School on the North Shore, Auckland from 1979 to 1982. Kerrin won the men's French Badminton singles open in 1986. And along with Glenn Stewart also won the men's French Badminton doubles open in 1986. Along with Phillip Horne, Kerrin Harrison represented New Zealand in Badminton men's doubles, at the 1990 Commonwealth Games in Auckland, New Zealand.
At the age of 28 Kerrin represented New Zealand at the 1992 summer Olympics in Barcelona in both the men's singles and doubles for Badminton[1] He was a New Zealand representative for ten years. He won the men's masters (over 45s) Badminton singles in New Zealand, 17–20 September 2009.