Sullivan suffered an severe ankle injury and averaged only 7.1 points over 18 games in his first varsity season at Georgetown. In 1965-66 he led the team in scoring and rebounding. In 1966-67, Sullivan scored in double figures in 21 of 23 games, scored 20 or more points 10 times and averaged 18.6 points and 11.8 rebounds a game. That season, Sullivan had 33 and 17 against American University, 26 points with 23 rebounds vs. Syracuse University, and had 18 and 16 vs. Seton Hall in his final game. He is one of only seven Georgetown players ever to lead the team in scoring and rebounding in consecutive seasons. Sullivan graduated from Georgetown as the school's seventh all-time scorer, second all time rebounder, and the highest NBA draft pick to date in program history. Sullivan remained the highest Georgetown NBA pick until Sleepy Floyd was the 13th pick of the 1982 NBA Draft. Both were surpassed when Patrick Ewing was the first pick of the 1985 NBA Draft. Sullivan was selected as a member of the USA Basketball Gold Medal teams of the 1967 Pan Am games and 1968 World University Games. The USA Team for the Pan-Am games captured the Gold medal by going 9-0 with the Gold Medal Game victory over Mexico. The 1967 World University Team also won the Gold Medal, going 7-0, defeating Brazil 91-38 in the Gold Medal Game. Sullivan averaged 7.2 points in the Games. Sullivan's teammates on both squads included his future Detroit fellow draft pick Sonny Dove, Jo Jo White and Wes Unseld.
Professional career
Sullivan was drafted by the ABA's Pittsburgh Pipers in the 1967 ABA Draft. Pittsburgh had just signed Connie Hawkins at power forward, so Sullivan waited for the NBA draft that summer. Selected 14th in the draft by the Detroit Pistons in an overall draft that included Earl Monroe, Pat Riley, Clem Haskins, Walt Frazier, and Phil Jackson, the Pistons had two of the first four overall picks. The Pistons drafted Jimmy Walker with the first overall pick, then drafted Sonny Dove with the 4th overall pick. The Pistons opted to sign Dove over Sullivan. Later, Sullivan spent nine years professionally playing in Italy and Spain, receiving numerous MVP awards.
Death
After living and working for 45 years in Spain, Italy and England, Sullivan passed away in London, England on August 27, 2014 surrounded by his family.
