Wildsmith was born in Darlington, County Durham, and played football for Darlington Grammar School Old Boys team before joining Darlington F.C. He was playing for their North Eastern League team by January 1929, at outside right in a visit to Hartlepools United"s reserves.
He also played for Darlington Grammar School Old Boys. In October 1930, against Carlisle United"s reserves, he was "a danger spot throughout the game" and scored twice as Darlington came back from a three-goal deficit to draw the match. He made only six appearances in the Football League side, the last of which was in the 1933-1934 season.
He was also a keen cricketer and played cricket for Darlington and Durham.
Wildsmith died in Darlington at the age of 91.
