Answer by taking a quote from the following article:

Richard Hirschfeld Williams (May 7, 1929 - July 7, 2011) was an American left fielder, third baseman, manager, coach and front office consultant in Major League Baseball. Known especially as a hard-driving, sharp-tongued manager from 1967 to 1969 and from 1971 to 1988, he led teams to three American League pennants, one National League pennant, and two World Series triumphs. He is one of seven managers to win pennants in both major leagues, and joined Bill McKechnie in becoming only the second manager to lead three franchises to the Series. He and Lou Piniella are the only managers in history to lead four teams to seasons of 90 or more wins.

Williams was born on May 7, 1929 in St. Louis, Missouri, and grew up there until age 13, when his family moved to Pasadena, California. After attending Pasadena City College, he signed his first professional contract with the Brooklyn Dodgers in 1947, and played his first major league game with Brooklyn in 1951. Initially an outfielder, he separated a shoulder making a diving catch early in his career, weakening his throwing arm. As a result, he learned to play several positions (he was frequently a first baseman and third baseman) and became a notorious "bench jockey" in order to keep his major league job. He appeared in 1,023 games over 13 seasons with the Dodgers, Baltimore Orioles, Cleveland Indians, Kansas City Athletics and Boston Red Sox. A right-handed batter and thrower, Williams had a career batting average of .260; his 768 hits included 70 home runs, 157 doubles and 12 triples. He was a favorite of Paul Richards, who acquired Williams four different times between 1956 and 1962 when Richards was a manager or general manager with Baltimore and the Houston Colt .45s. Williams never played for Houston; he was acquired in an off-season "paper transaction" on October 12, 1962, then traded to the Red Sox for another outfielder, Carroll Hardy, on December 10. His two-year playing career in Boston was uneventful, except for one occasion. On June 27, 1963, Williams was victimized by one of the greatest catches in Fenway Park history. His long drive to the opposite field was snagged by Cleveland right fielder Al Luplow, who made a leaping catch at the wall and tumbled into the bullpen with the ball in his grasp.

what positions did he play?
(he was frequently a first baseman and third baseman