Over his entire All Black career Clarke scored 781 points, a record that stood for 24 years until it was broken by Grant Fox in 1988.

[1] A highlight of his career was to play for the Eastwood Rugby Club (Sydney, Australia) in an exhibition match.

Clarke also played 27 first-class cricket matches as a right-arm opening bowler, mostly for Auckland and Northern Districts, taking five or more wickets in an innings on four occasions.

[2] At the time, this was a record innings return for Northern Districts in first-class cricket, although it was beaten by Gren Alabaster's 8/30 just two months later.

In 1977 he moved to South Africa, together with wife Patsy, son Glen and daughters Leigh and Shelley.