1973 American Motocross - Jim Gianatsis
Mark Blackwell, former 1971 AMA National Motocross Champion, returned to racing a Daytona in 1973 after suffering a serious eye injury racing the 500cc Grand Prix Championship in Europe in 1972.

Mark Blackwell, former 1971 AMA National Motocross Champion, returned to racing a Daytona in 1973 after suffering a serious eye injury racing the 500cc Grand Prix Championship in Europe in 1972.

Mark BlackweelHusqvarna1973500ccNational Motocross Champion