Carless made his first-class debut for Glamorgan in 1934 against Middlesex, though Tom Brierley kept wicket in this match; he played one further match for the county in that season, against Surrey, when Carless kept wicket.
Following the end of the war and the resumption of County Cricket in 1946, Carless made his final first-class appearance, 12 years after his previous first-class match, in a Glamorgan side which was beset by injuries and struggling to field a team.
[6] He began his career at Wolverhampton Wanderers, but did not make a first team appearance, and then returned to Wales to play for Barry Town.
[6] Carless made his Football League debut in 1932 with Cardiff City and spent several years there without establishing himself in the first team.
[5] In 1947, soon after his last appearance for Argyle, Carless accepted an offer to become the club's head groundsman, having gained experience doing the job for Cardiff City before moving to Plymouth.