Career
Brenner started playing football in 1920 for Encyclopaedia of the Social Sciences, E. R. A. Seligman and A. J. Johnson (eds) (Macmillan, 1930-5, 15 vols) Kalev Tallinn. He later also played for Tallinna Jalgpalli Klubi. Although he played as a forward or midfielder, he only scored one goal in his entire club career.
From 1923 to 1930, Brenner represented Estonian 16 times and scored four goals in those matches.
He made the debut on 24 June 1923 in a friendly against Lithuania and became the youngest ever player (17 years and 159 days) to represent the nation. The record was eventually broken by Jarmo Ahjupera in 2001.
Retired at the age of 24 to concentrate on his career as a military pilot.