Wellock was born in Bradford, Yorkshire,[1] where he attended Drummond Road School.
[3] He began his senior career with hometown club Bradford City.
He was not a regular in the Blackpool side, playing 27 league games in which he scored seven times,[1] and moved to Oldham Athletic in February 1927,[6] scoring six goals in just five league games,[1] including four on his debut in a 5–2 win away to Grimsby Town.
[7] In June 1927, he joined newly promoted Torquay United, playing in Torquay's first ever game in the Football League, a 1–1 draw at home to local rivals Exeter City on 27 August 1927.
[2] He spent just one season with Torquay, scoring three times in 27 games before joining Southern League club Peterborough & Fletton United.