William C. "Whitey" Thomas (August 17, 1895 – August 1978) was an American football end. At 5'10", 180 pounds, he played for the Frankford Yellow Jackets in 1924 in the National Football League at the age of 29 and for the Philadelphia Quakers in 1926 in the first American Football League at the age of 31. Thomas also played for the Yellow Jackets in 1922 and in 1923, before the team became members of the NFL. He played college football for Penn State Nittany Lions.