Glenn Richard "Rocky" Nelson (November 18, 1924 – October 31, 2006) was an American professional baseball first baseman who played in Major League Baseball (MLB) for all or parts of nine seasons between 1949 and 1961 for the St. Louis Cardinals, Pittsburgh Pirates, Chicago White Sox, Brooklyn Dodgers and Cleveland Indians. A native of Portsmouth, Ohio, Nelson batted and threw left-handed, stood 5 feet 10 inches (1.78 m) tall and weighed 175 pounds (79 kg). He signed his first professional contract in 1942 with the Cardinals' organization. He then missed three seasons (1943–1945) while serving in the United States Army during World War II.