Starting his career with Blyth Spartans, and turning professional with Sheffield United,  Jack Kennedy arrived at Exeter City in 1932 having scored regularly for Tranmere Rovers. Enjoying little success at St James’ Park he moved on to Torquay United. 

Starting his football career with Blyth Spartans, Jack signed for Sheffield United in 1929 but didn’t make a league appearance before moving to Tranmere Rovers the following year where he scored 45 goals in just 65 outings.

Arriving at Exeter City in the summer of 1932, Jack made his debut against Brentford in the fifth game of the season on 10 September 1932. Not playing again until January he played in two-thirds of the remaining games with goals against Coventry, Torquay and Cardiff.

Released at the end of the season, Jack went on to sign for Torquay United where he netted just once in 19 league starts before spending the 1934/35 season with Watford for whom he failed to make a league outing.