William Leslie Davis (born 15 December 1942) is a former rugby union and softball player in New Zealand.
A wing and centre, Davis represented Hawke's Bay at a provincial level, and was a member of the New Zealand national side, the All Blacks, from 1963 to 1970. He played 53 matches for the All Blacks including 11 internationals.
Davis played as an outfielder for the New Zealand men's national softball team, known as the Black Socks, at the 1972 and 1976 softball world championships. In 2001, he became patron of the Rotorua Softball Association.
In 2006, Davis was inducted into the Hawke's Bay sports hall of fame.