Life and playing career
Born in Cleland, Lanarkshire, Scotland, McNab played for Bellshill Athletic before being signed by Liverpool in November 1919. He made his debut in a 0–0 draw with bitter rivals Man United at Anfield in a Division 1 fixture on the New Years Day 1920; he had to wait until 15 April 1922 to open his account for the Reds, again it was at Anfield but this time the opponents were Cardiff, his 73rd-minute strike was the 4th goal of the 5–1 drubbing of the Bluebirds.
McNab, a wing-half, struggled to break into the starting line-up during his first two seasons at Liverpool; he made just 3 appearances in this spell. It wasn't until 10 games into the 1921/22 campaign that McNab nailed a permanent role in manager Dave Ashcroft's plans but only after Jack Bamber and Francis Checkland had started the first 9 fixtures; he took his chance well and only missed 4 of the remaining matches in the first of the back-to-back title winning seasons. McNab added a second winners medal to his collection when he missed just 3 matches of the 1922/23 season.
McNab remained a stalwart of the Reds backline for four more years when he was allowed to leave for West London club Q.P.R in the June 1928 at the age of 34. McNab had appeared in a red shirt 222 times, exactly 200 in the league, scoring 6 goals, all of which were in the league.
- Liverpool F.C (1919–1928) 222 appearances 6 goals - Two Football League First Division Championship winners medals (1922 and 1923)