Theodore Amar Lyons (December 28, 1900 – July 25, 1986) was an American professional baseball starting pitcher, manager and coach in Major League Baseball (MLB). He played in 21 MLB seasons, all with the Chicago White Sox. He is the franchise leader in wins. Lyons won 20 or more games three times (in 1925, 1927, and 1930) and became a fan favorite in Chicago.
Lyons was inducted into the Baseball Hall of Fame in 1955. He has the fourth-highest career ERA among Hall of Fame pitchers, and is the only Hall of Fame pitcher to have more walks than strikeouts. In 1981 Lawrence Ritter and Donald Honig included Lyons in their book The 100 Greatest Baseball Players of All Time.