Robert Walkup Smith (May 13, 1928 – June 23, 2003), nicknamed "Riverboat", was an American professional baseball player. He was a left-handed pitcher who appeared in 30 games in the Major Leagues over parts of 1958 and 1959 for the Boston Red Sox, Chicago Cubs and Cleveland Indians. He was listed as 6 feet (1.8 m) tall and 185 pounds (84 kg), and attended the University of Missouri. Altogether, Smith compiled a 4–4 MLB win–loss record, with no saves, and a 4.75 earned run average. He gave up 97 hits and 59 bases on balls, with 60 strikeouts, in 962⁄3 innings pitched.