Kenneth Darby (born December 26, 1982) is a former American football running back.

With the graduation of Shaud Williams and starter Ray Hudson falling to injury, Darby saw extensive action in 2004.

Taking over the starting running back job five games into the season, Darby rushed for over 1,100 yards.

Due an injury at the end of the season, Darby was unable to play in the Music City Bowl.

Darby entered 2005 as a preseason All-SEC player and finished the season as one of the top running backs in the SEC.

That year, the Crimson Tide finished 10-2 with a victory over Texas Tech in the Cotton Bowl Classic.

Darby was signed to the St. Louis Rams' active roster from the Falcons' practice squad on October 14, 2008, after running back Brian Leonard was placed on injured reserve.

[5] During a game against the San Francisco 49ers, Darby caught a pass and was struck by Umpire Garth DeFelice who was trying to protect himself.