In 1979, Roberts signed during the season with the Atlanta Chiefs of the North American Soccer League and promptly scored fourteen goals in nineteen games.
He played the 1980 and 1981 outdoor seasons with the Rowdies, scoring twelve goals in fifty-three games.
Roberts began the 1982 season in Edmonton before being sent to the Toronto Blizzard in June.
In November 1987, Roberts signed as a free agent with the Minnesota Strikers.
In 1990, he joined the newly established, independent amateur club, the Minnesota Thunder.