Leonard Barnett Davis (born September 5, 1978) is an American football guard who last played for the San Francisco 49ers of the National Football League (NFL). He played college football for the University of Texas, and was recognized as an All-American. He was drafted by the Arizona Cardinals with the second pick overall of the 2001 NFL Draft, and has played professionally for the Arizona Cardinals, Dallas Cowboys, Detroit Lions and San Francisco 49ers. He is currently a free agent.