Diamond was also a member of the BC Lions of the Canadian Football League (CFL).
[1] He attended Archbishop Curley-Notre Dame High School in Buena Vista, Miami, Florida.
[1] Diamond played in two games for the BC Lions of the Canadian Football League in 1959 as a tackle.
[1] Diamond was signed by the Dallas Texans of the American Football League (AFL) in 1960.
[4] He played in 14 games, starting four, as an offensive tackle during the team's inaugural 1960 season.