Newcastle born centre forward Ted Magner began his football career with junior teams Stainton Celtic in 1907 and West Hartlepool Expansion in 1908 before joining Second Division Gainsborough Trinity, for whom he made his Football League debut at Derby County in September 1909, scoring once in 6 appearances during 1909-10. He was transferred to Everton in 1910 and scored 3 goals in 9 appearances between January and March 1911, before joining St Mirren in January 1912. He stayed 3 years at Love Street, making a good impression and scoring 29 goals in 55 appearances before returning to Merseyside in 1914 to join non league South Liverpool. After the First World War he had a spell from 1919 with Shelbourne in the Irish League and then went into coaching and management, for which he is best known.
He managed Lille between 1935 and 1937, and Metz from 1937 to 1938. Magnier was asked to coach the Denmark national football team for the 50th anniversary tournament of the Danish Football Association in 1939. He was seen as possessing a great natural authority, and he introduced a focus on physical conditioning unknown to the then strictly amateur-only Danish football. Magnier managed Denmark for the two games at the tournament, as Denmark won against both Finland and Norway. During the Second World War he was manager of Huddersfield Town from 1942 to 1943 and became manager of Derby County in 1944. He was their manager for the first 2 FA Cup ties of their triumphant 1946 FA Cup campaign, Stuart McMillan being Derby’s manager at Wembley in their triumph over Charlton Athletic. Wagner returned to Metz in 1946 where he managed for another season.