Easson was born in Brechin and played for various Scottish junior clubs, including Carnoustie and East Craigie[2] before joining Dundee.
He made his debut for the first-team in a 0–0 draw against Manchester United at Old Trafford in May 1929, shortly after "Pompey" had been defeated in the 1929 FA Cup Final.
[5] Easson soon became a regular member of the Portsmouth side, replacing the ageing David Watson at inside-left and forming a useful partnership with Jack Weddle.
Shortly afterwards, he was named by the England selectors for their international side for a match against Ireland,[7] but they realised their mistake when the records were checked for Easson's birthplace.
[11] Easson played in the 1934 FA Cup Final defeat against Manchester City at Wembley[12] and stayed at Fratton Park until March 1939 when he joined Fulham.
By now, he had lost his place at inside-left to Bert Barlow; his last game for Portsmouth ended identically to the first, against Manchester United with a 0–0 scoreline in December 1938.