 Complete the following phrase:  Sunderland Association Football Club was founded in September 1880 as Sunderland and District Teachers Association Football Club. After turning professional in 1886, the club appointed Tom Watson as their first manager, and under Watson the team won the Football League First Division three times in four seasons. The percentage of games won under Watson remains the highest of all time for a Sunderland manager. Watson left to manage Liverpool and was replaced by Robert Campbell, but the new manager failed to continue the success of his predecessor. The next three managers, Alex Mackie, Bob Kyle and Johnny Cochrane, each won the First Division title while at the club. Kyles 817 games in charge, spread over 19 full seasons either side of the First World War, make him Sunderlands longest-serving manager. Cochrane led the club to their first FA Cup victory, beating Preston North End 31 in the 1937 final. The closest they had come in previous seasons was as losing finalists in 