The fifth of the seven children of Arthur Ernest Dayman,[2] and Edith Annie Dayman, née Smitham,[3] Leslie Clarence Dayman was born at Salisbury, South Australia on 28 October 1901.
His eldest brother, Clem Dayman, also played with Port Adelaide.
Dayman married Maria Jane "Ria" Diks on 2 January 1932.[4][5] Their son, Leslie Dayman, was the notable Australian stage, screen and TV actor, and their grandson, Chris McDermott, was the inaugural captain of Adelaide Crows.[6]
Football
Port Adelaide (1921–1931)
Les Dayman started his career at Port Adelaide in 1921, after arriving from Salisbury. During that year he was a member of the club's premiership team. He played beside his brother Clem at the club during the 1920s and was used mostly as a ruckman or in the key forward positions. On three occasions Dayman won Port Adelaide's 'Best and Fairest' award and also topped their goal-kicking four times. He was the league's top goal-kicker in 1929 with 86 goals.
A regular South Australian interstate representative, he made a total of 19 appearances and kicked 30 goals for his state.
Footscray (1932–1934)
Footscray acquired his services in 1932 and he had a solid first season, kicking a bag of five against Fitzroy in his second game and topping the club's goal-kicking with 37 majors.
Coburg (1934)
Following a three-year VFL stint, Dayman played briefly at Coburg in the Victorian Football Association (VFA). He was cleared to Coburg after his round eight VFL match against Richmond in late June 1934.
Dayman played in Coburg's losing 1934 VFL grand final loss.[7][8]
Yarraville / Sunshine (1935)
Dayman was initially appointed as captain-coach of Maryborough in the Bendigo Football League in late March 1935, but the position must of fell through,[9] but he was then cleared from Coburg to Yarraville in early April, 1935 and later played with Sunshine.[10]
He returned to Port Adelaide in 1937,[12] making one further appearance for the seniors,[13][14] before going on to serve the club in an off field capacity.
Dayman was awarded Life Membership of the Port Adelaide in 1938.[15]
Military service
He served in the Australian army during the Second World War from 8 April 1942 to 14 September 1944.