Staller was a minor leaguemanager for 14 seasons, 1948 through 1961. He began in the A's system (1948–53), then moved with Philadelphia general managerArthur Ehlers to the American League Orioles organization in its first season in Baltimore, 1954. Staller reached the Triple-A level for one season, in 1960 with the Vancouver Mounties; his career managing record was 922wins, 1,043 losses (.469).
Staller's first term as an Orioles coach came in 1962, when he served one year under skipper Billy Hitchcock. Then, after 5+1⁄2 seasons as a Baltimore scout, he rejoined the Orioles staff when Weaver was promoted from first-base coach to manager in July 1968. Staller served until his retirement from the field at the close of the 1975 season. He was listed as a scout for the Seattle Mariners for the expansion team's inaugural American League season, 1977. George Staller died at age 76 in Harrisburg, Pennsylvania.