 Brenner played defensive back for the Hamilton Tiger-Cats, Winnipeg Blue Bombers and Ottawa Rough Riders from 1971 to 1977.He was a CFL All-Star in 1972, the same year he set a record of most interceptions in a season at 15, and also won the Grey Cup with the Tiger-Cats.He was also part of the Ottawa Rough Riders when they won the Grey Cup in 1976.