The brother of Ben Flint who made 13 appearances for Nottinghamshire in 1919 and 1920, William enjoyed a distinguished career in league football before turning his attention to cricket. He made his debut for Notts County FC in 1908 and captained the club when they won promotion to the top tier of English football in 1923.
His right-arm medium pace bowling captured 6-53 on debut against Middlesex at Lord’s in May 1919 and he also registered three first-class hundreds. An honourable man, he trod on his wicket against Middlesex at Lord’s in 1927 but was given not out by an unsighted umpire only to give his wicket away with the very next ball.
He enjoyed a testimonial fixture in 1929 after taking 237 wickets and scoring 6,971 runs in 145 matches for Nottinghamshire.