Harry I. Dalton (August 23, 1928 – October 23, 2005) was an American front-office executive in Major League Baseball. He served as general manager of three American League teams, the Baltimore Orioles (1966–71), California Angels (1972–77) and Milwaukee Brewers (1978–91), and was a principal architect of the Orioles' dynasty of 1966–74 as well as the only AL championship the Brewers ever won (1982).
Born in West Springfield, Massachusetts—the same hometown of Baseball Hall of Fame manager Leo Durocher—Dalton graduated from Amherst College and served in the United States Air Force during the Korean War, earning a Bronze Star. After a brief stint as a sportswriter in Springfield, he joined the front office of the Orioles—newly reborn as the relocated St. Louis Browns—in 1954. For the next 11 years, Dalton worked his way up the organizational ladder, rising to the position of director of the Orioles' successful farm system.
In the autumn of 1965, Baltimore general manager Lee MacPhail departed to become top aide to the new Commissioner of Baseball, William Eckert. Dalton was named Director of Player Personnel—in effect, MacPhail's successor. His first order of business was to complete a trade that brought Cincinnati Reds outfielder Frank Robinson to Baltimore for pitchers Milt Pappas and Jack Baldschun and a minor league outfielder. Robinson, 1961 National League Most Valuable Player, was one of the greatest stars in the game, but he had developed a strained relationship with the Cincinnati front office. In Baltimore, he would team with third baseman Brooks Robinson to lead the O's to the 1966 and 1970 World Series championships, and pennants in 1969 and 1971. Dalton was the man who hired Earl Weaver as manager, brought to the Majors young stars such as Bobby Grich and Don Baylor, and acquired key players such as Mike Cuellar, Pat Dobson and Don Buford. (Weaver, Frank Robinson and Brooks Robinson, along with pitching great Jim Palmer, a product of Dalton's farm system, are all in the Hall in Fame.)