Sunderland born goalkeeper Jack Mew first played junior football for Blaydon Athletic in 1906 and joined Marley Hill St Cuthbert’s in 1908, Sunnyside in 1909, Blaydon United in 1910 and Marley Hill United in 1911, from where he signed for First Division Manchester United in September 1912 aged 23. He made his Football League debut against Middlesbrough in March 1913, and despite the interruption of World War One, by when he had only made 4 appearances as understudy to Bobby Beale, he went on to play 199 games in goal for United over the next 14 years, missing only 4 games in the initial 4 seasons after peacetime football resumed.
In October 1920 he won his only England international cap when he played against Ireland in a 2-0 win at Roker Park, in addition he also played once for The Football League in a 1-0 victory over The Scottish League at Highbury in March 1921. In his final season at United he played 5 FA Cup ties in the cup run that saw them beaten in the FA Cup semi final, but Alf Steward was their custodian for the actual semi final defeat to Manchester City. In September 1926 he signed for Barrow where he finished his professional career with 30 appearances in the 1926-27 season, although he also won representative honours in 1928 being selected by the Football Association to tour South Africa. In 1927, he became a player-coach for TSV Lyra in Belgium. In June 1928, he became a coach for Lima.