Richard Clark Ellsworth (March 22, 1940 – October 10, 2022) was an American professional baseball starting pitcher, who played in Major League Baseball (MLB) for the Chicago Cubs (1958, 1960–1966), Philadelphia Phillies (1967), Boston Red Sox (1968–1969), Cleveland Indians (1969–1970), and Milwaukee Brewers (1970–1971). Ellsworth was an All-Star in 1964.