|Date of birth||19 January 1883|
|Place of birth||Willesden, England|
|Playing position||Half back|
|1903-09||Queens Park Rangers||170||(13)|
|* Senior club appearances and goals counted for the domestic league only. † Appearances (Goals).|
Downing's career started at Willesden Town, but spent time at Willesden Green and Park Royal football clubs before being transferred to West Hampstead. He moved to Queens Park Rangers in 1903 where he scored a hat-trick on his debut against Swindon Town.
He moved to Chelsea in April 1909, where he was part of the team that made it to the semi final of the 1910-11 FA Cup and was promoted to the Football League First Division in 1911-12 when they finished second in the Second Division.
After retiring from professional football, he became a cricket coach.
- Queens Park Rangers
- Southern League - 1909-10
- Football League Second Division (runners-up) - 1911-12
- Macey, Gordon (2009). Queens Park Rangers: The Complete Record. Derby, UK: Breedon. ISBN 9781859837146.
- "Sam Downing". ChelseaFC.com. Retrieved 1 July 2012.
- Macey (2009): p. 216