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).

[1] He played amateur baseball in Fresno as a teammate with future major leaguers Jim Maloney and Pat Corrales.

[1][4] After pitching well in an exhibition game against the Chicago White Sox, the Cubs had Ellsworth make his major league debut on June 22 against the Cincinnati Reds.

[1] Ellsworth won the National League Player of the Month Award in May 1963 as he allowed six earned runs in 42 innings pitched.

After the 1967 season, the Phillies traded Ellsworth and Gene Oliver to the Boston Red Sox for Mike Ryan and cash considerations.

[10] He was traded along with Ken Harrelson and Juan Pizarro from the Red Sox to the Cleveland Indians for Sonny Siebert, Vicente Romo and Joe Azcue on April 19, 1969.