Bob Melvin was named the 2012 manager of the year in the American League, while Davey Johnson took top honors in the National League.
Melvin, 51, guided the Oakland A's as they stormed from 13 games back to overtake the Texas Rangers and capture the American League West title on the final weekend of the regular season.
The A's finished with a record of 94-68 under Melvin, who had previously garnered manager-of-the-year honors in 2007 as skipper of the Arizona Diamondbacks.
The club, which had finished well out of contention the previous season with a record of 74-88 and had the lowest payroll in baseball in 2012, lost 3-2 to the Detroit Tigers in the first round of the playoffs.
Melvin barely beat out Baltimore Orioles manager Buck Showalter in the Baseball Writers' Association of America voting with 16 first-place votes to 12.
Johnson, 69, was named manager of the year in the National League after leading the Washington Nationals to a league- and franchise-best record of 98-64, 18 more wins than in the previous season.
The Nationals' year ended on a down note, however, when the St. Louis Cardinals stunned them with an improbable rally in the deciding fifth game of their divisional series.
Johnson, who picked up 23 of 32 first-place votes, was also a second-time recipient of this award, having won it the first time in 1997 as manager of the Baltimore Orioles. EFE