So the obvious ones of course include Boston's John Farrell, who was traded from the Toronto Blue Jays last off season in exchange for SS Mike Aviles and RHP David Carpenter. A year earlier, the Chicago White Sox traded manager Ozzie Guillen to the soon to be Miami Marlins along with RHP Ricardo Andres for RHP Jhan Marinez and infielder Ozzie Martinez. Obviously, the deal did not work out as well as Miami would have thought.
Lou Piniella is considered the best manager in the history of the Seattle Mariners franchise. To be closer to his family, Piniella showed interest in relocating to the Tampa Bay area. The Mariners and Devil Rays agreed to a deal that sent Piniella and infielder Antonio Perez to the Devil Rays for OF Randy Winn.
The Oakland Athletics traded manager Chuck Tanner to the Pittsburgh Pirates after the 1976 season in exchange for catcher Manny Sanguillen. Tanner had only managed the Athletics for 1 season, but helped lead the Pirates to the 1979 World Series Championship. Sanguillen was reacquired by the Pirates and was part of the team as well.
Gil Hodges was traded by the Washington Senators to the New York Mets after the 1967 season for RHP Bill Denehy. However, that was not the first time Hodges was traded to the Senators when he was still playing for the New York Mets. Hodges, of course, was a player on the 1962 and 1963 Mets and during the 1963 season was traded to the Senators in exchange for veteran OF Jim Piersall.
The only other trade involving MLB managers involved two teams that traded their managers for one another. In what was referred to as a publicity stunt, the Cleveland Indians traded manager Joe Gordon to the Detroit Tigers in exchange for manager Jimmie Dykes. Neither manager worked out with their new team, or even stuck around for a while.
In addition, the Philadelphia Athletics traded future Hall of Fame catcher Mickey Cochrane to the Detroit Tigers for Johnny Pasek, where he would become player/ manager. During the middle of the 1984 season, the Cincinnati Reds traded OF Tom Lawless to the Montreal Expos for Pete Rose, who immediately became player/manager.