 At the 1960 Summer Olympics in Rome, Italy he won the silver medal in the long jump, a centimeter short of the Olympic record 8.12 m gold medal jump by Ralph Boston.After the Olympics, Roberson had a seven-year Pro Football career as a wide receiver in the American Football League with the San Diego Chargers, Oakland Raiders, Buffalo Bills, and Miami Dolphins.He caught three passes for eighty-eight yards in the Bills' 23–0 defeat of the Chargers in the 1965 American Football League Championship Game.