Milton Regis, Kent born outside left Alf Black began his football career with Sittingbourne, before joining Third Division (South) club Millwall in 1924, making his Football League debut at Aberdare Athletic in October that year. After 3 matches that month, he had a run of 9 matches in his debut season from January to March but played only twice in 1925-26 as Millwall finished third in the division.
Black broke into the team on a regular basis from September 1926 and was a regular as they finished third for the second season running in 1926-27, scoring 8 goals in the campaign, and he again scored 8 times as Millwall won the Third Division (South) Championship in 1927-28 to finally win promotion to the Second Division, missing only one match during the triumphant season.
However at the higher level he had lost his place by September, and although he got back into the team at the end of January, playing through the rest of the campaign as Millwall finished a respectable 14th, he had lost his place by the start of the next season, spending two seasons on the fringes at The Den, before joining Luton Town in the summer of 1931 after 23 goals in 117 appearances for The Lions. However he played only once for Luton, in a defeat at Coventry City in October 1931, before joining non league Folkestone in 1932.