 During the First World War Pym joined in 1916 the Devonshire Regiment where he served as Physical Training Instructor.When Exeter City joined the Football League in 1920 Pym was sold to Bolton Wanderers when he lived at 26 Normanby Street in Bolton, at end of the 1920/21 season for the enormous sum of £5,000 to enable the club to purchase its home ground, St James Park.Pym debuted for England on 28 February 1925 at a 2–1 win over Wales.