|Full name||Robert William Jefferson|
|Date of birth||1882|
|Place of birth||Sunderland, England|
|Playing position||Outside right|
|–||Sunderland Royal Rovers|
|* Senior club appearances and goals counted for the domestic league only.
† Appearances (Goals).
Robert William Jefferson was born in Sunderland, Tyne and Wear, Tyne and Wear in 1882. He left school to join the Royal Navy, before deserting after a few weeks to become an apprentice moulder at a foundry back in Sunderland. At this time, he began playing junior football with local team Sunderland Royal Rovers, before becoming a professional footballer.
He began his professional career at Bradford City in November 1904, scoring six goals in 30 appearances in the Football League over the next two seasons. Jefferson joined local rivals Leeds City in May 1906, scoring on his debut against Leicester Fosse. By May 1908, Jefferson had moved to Swindon Town along with former-Leeds players Harry Kay and Jack Lavery. Jefferson was to remain with the Wiltshire club for the next fourteen years, despite his career being disrupted by World War I. At Swindon, Jefferson made 356 appearances in all competitions, scoring 82 goals. His spell at Swindon included an appearance in the 1911 FA Charity Shield, and eleven appearances for the Southern Football League representative team. Jefferson also scored in Swindon's first ever game in the Football League, in a 9-1 victory against Luton Town. In total, Jefferson made 321 appearances in the Football League and the Southern Football League between 1904 and 1922, scoring 78 goals.
After retiring as a player, Jefferson coached Dutch team Vitesse from 1924 to 1927.
- "Player profile". Oz White LUFC. Retrieved 18 June 2010.
- "Player profile". Mighty Leeds. Retrieved 18 June 2010.
- Frost, Terry (1988). Bradford City A Complete Record 1903-1988. Breedon Books Sport. ISBN 0-907969-38-0.
- Mattick, Dick (2002). Swindon Town Football Club: 100 Greats. Tempus Publishing. ISBN 0-7524-2714-8.