Ryan Stewart Theriot (pronounced /ˈtɛri.oʊ/; born December 7, 1979 in Baton Rouge, Louisiana) is a Major League Baseball infielder for the St. Louis Cardinals.
Theriot is the son of Randy and Mary Theriot, and has an older brother Wes and younger brother Austin. Both his father and older brother played baseball at Broadmoor High School.
Theriot graduated from Broadmoor High School in Baton Rouge, La in 1998. While there he played 3 seasons on the basketball team point guard and 4 season on the baseball team shortstop. He was a highly decorated baseball player, so he opted to not play basketball during his senior year of high school to focus on his baseball skills. While at Broadmoor he played along side with childhood friends, Mike Woods and Trae Duncan and together they set Louisiana High School Athletic Association history with becoming All American infielders from the same high school. They all later became 1st team All State for class 4A at third base, short stop, and second base, becoming the first ever trio to earn such awards. A shortstop in college, Theriot was converted to second base for his major league debut, but played shortstop throughout the 2007-2009 seasons. Theriot then was switched back to second base to make room for the rookie sensation Starlin Castro, who took his spot at shortstop on May 7, 2010. Theriot has also played third base, right field, and left field.