Lewis Oscar "Bull" Smith (August 20, 1880 – May 1, 1928) was a Major League Baseball outfielder. He played from 1904 to 1911 for the Chicago Cubs, Pittsburgh Pirates, and Washington Senators. Smith attended West Virginia University, where he played four seasons (1900–1903) of college baseball for the Mountaineers.
Outside of baseball, Smith played football in 1905 for the Canton Athletic Club. He remained with the team in 1906 as they were renamed the Canton Bulldogs. Smith and Canton played in the "Ohio League", which was the direct predecessor to the National Football League. Smith played halfback for the Bulldogs in 1906 when a betting scandal involving Canton and their rival, the Massillon Tigers, arose.