His "biggest" win was against Peter McNeeley, whose claim to fame was losing to Mike Tyson in 89 secs.
He lost to a 51 year old Larry Holmes and journeyman Billy Zumbrun.
Despite having 89 fights he never challenged for a legitmate world title i.e. IBF, WBC or WBA (maybe add WBO, as well). If you look at his record a large majority of his opponents had losing records.