Darren Lee Sproles (born June 20, 1983 in Waterloo, Iowa) is an American football running back for the San Diego Chargers of the National Football League. He was drafted by the Chargers in the fourth round of the 2005 NFL Draft. He played college football at Kansas State.

At 5'6", Sproles is currently the shortest NFL player.

Sproles attended Rolling Ridge Elementary, then Oregon Trail Junior High, followed by Olathe North High School, all in Olathe, Kansas. He has been conquering a speech impediment he has had since childhood. Sproles was a star in football, earning the name "Tank," after being born at 10 lbs. For two consecutive years, he was an All-Sunflower League honoree, All-Metro honoree, and an All-State selection. Additionally, he was twice named The Kansas City Star Player of the Year. As a senior, he was named the Kansas Hall of Fame Player of the Year and the USA Today Kansas Player of the Year. Throughout his high school career, Sproles rushed for 5,230 yards, averaging nearly 8.4 yards per carry and 79 touchdowns.