 He joined Northamptonshire in 1964, and the following season, coming into the side regularly from mid-July, took 42 wickets at an average of 18 each, including 27 in just three matches.Northamptonshire finished second in the County Championship, four points behind the eventual winners, Worcestershire, the closest the team has ever come to winning the title.In 1966, Sully played the full season and took 101 wickets at 21 runs each, the only time he took 100 wickets in a season.