Giants (1958–1961) In December 1957, the Giants added Parker to their coaching staff. He was the club's third-base coach from 1958 to 1961. He resigned the position in October 1961 to accept a position with the
Cleveland Indians.
Indians (1962) In October 1961, Parker was hired as third-base coach for the
Cleveland Indians. He joined longtime friend
Mel McGaha who took over as the Indians' manager.
Angels (1964–1966) In October 1963, Parker was hired by the
Los Angeles Angels. He rejoined manager
Bill Rigney for whom he had previously coached with the Giants. He was the Angels' third-base coach from 1964 to 1966, during which time the team became the California Angels. In October 1966, the Angels fired four of their coaches, including Parker. He served as manager of the Santo Domingo team in the
Dominican Republic league during the off-season between the 1966 and 1967 seasons.
New York Mets (1967) Parker was hired as a coach by the
New York Mets in November 1966, replacing
Whitey Herzog as the club's third-base coach. When
Wes Westrum resigned as the Mets' manager on September 21, 1967, Parker took over as interim manager for final 11 games of the season, compiling a 4–7 record.
Astros (1968–1972) Parker was hired by the
Houston Astros in October 1967 as the team's third-base coach. He held that post through the 1972 season. On August 26, 1972, he led the Astros to a victory as interim head coach in between the tenures of
Harry Walker and
Leo Durocher. In early October 1972, Durocher fired Parker.
Angels (1973–1974) Parker returned to the
California Angels in November 1972 as their third base coach.
Dick Williams took over as the Angels' manager in late June 1974, and Parker was not asked to return to the club for the 1975 season.
Giants (1976–1985) Parker returned to the
San Francisco Giants in 1976 and was assigned as manager of the Class-A
Cedar Rapids Giants. He led Cedar Rapids to the league's division championship and won the league's manager-of-the-year award. He then worked as the Giants' minor league infield instructor from 1977 to 1985. Interviewed in 1983, Parker described his lifelong love of baseball: "It's a beautiful disease, that's the best way to describe it. I'll never be able to get it out of my system."
Mariners (1986–1987) In 1986, Parker was hired by the
Seattle Mariners. He was a roving minor league instructor in 1986. In 1987, at age 74, he was a coach for the Bellingham Mariners, working mainly with the infielders. ==Family and later years==