On 2 November 1929, 20-year old inside left forward Matt Busby made his professional debut. For Manchester City.
Despite being best known as the manager who raised Manchester United to glorious heights, including five First Division titles and the European Cup, Busby began his career on the blue side of town, signing with City in February 1928 at the age of 17. His first contract was worth £5 per week and included a clause that allowed him to leave after a year if he chose to rejoin his mother, who had emigrated to the United States.
But despite not getting a first-team appearance in that first year, he decided to stick it out with City and eventually got his debut at home against Middlesbrough. City won 3-1.
Busby stayed with City for eight seasons, making a total of 229 appearances and winning the 1934 FA Cup. In 1936, he moved to Liverpool where he played for four more seasons before World War II interrupted league play in 1939.
During the war, Busby got his first taste of management, taking charge of an Army side. When the war ended, he was preparing to return to Liverpool in a coaching role, but the move was interrupted by Manchester United, who offered him the job as manager. He accepted and proceeded to establish United as one of Europe's dominant sides.