The Giants signed Oates in 1985 at the relatively advanced age of 27. This was because he had initially played three seasons with the Philadelphia/Baltimore Stars in the USFL where he won two USFL championships. He thought highly of the USFL relative to the NFL and has stated that he feels the 1985 Philadelphia Stars of the USFL could have beaten the 1985 Philadelphia Eagles. Oates won three Super Bowl rings, two with the Giants in 1986 and 1990, and one with the 49ers in 1994. Oates was selected to five Pro Bowls during his career and to the UPI All-NFC team three times. He was extremely durable, starting 125 consecutive games during his Giants career.
Oates currently works in real estate, having graduated magna cum laude with a Juris Doctor degree from Seton Hall Law School. He is also a member of the New Jersey State Bar Association. He is currently chairman of the New Jersey Hall of Fame, a Hall of Fame for New Jersey residents and natives in a variety of fields ranging from scientists to athletes. In 2006 Oates voiced himself in the Aqua Teen Hunger Force episode "Bart Oates." He also spent time helping out as the line coach at Seton Hall Preparatory School earlier in the decade.
Bart's brother Brad also played offensive line in the NFL for six seasons on five different teams.