Louis Clark Brock (June 18, 1939 – September 6, 2020) was an American professional baseball left fielder. He began his 19-year Major League Baseball (MLB) career with the 1961 Chicago Cubs but spent most of it as a left fielder for the St. Louis Cardinals. An All-Star for six seasons, Brock was elected to the National Baseball Hall of Fame in 1985 in his first year of eligibility and was inducted into the St. Louis Cardinals Hall of Fame in 2014.
Best known for stealing bases, Brock led the National League (NL) in stolen bases in eight seasons, and set then-major league records for most steals in a single season and in a career. A member of the 3,000-hit club, he batted over .300 in full seasons seven times, and had additional full seasons of .297, .298, and .299. He finished his career with a .304 batting average in 436 plate appearances at age 40 in 1979, compiling a .293 career batting average. Brock led the NL in doubles and triples in 1968, and in singles in 1972. In 1974, he was the runner-up for the NL Most Valuable Player Award. After retiring as a player, he served as a special instructor coach for the Cardinals.