On November 30, 1972, major league teams pull off 12 trades involving 36 players. In the biggest deal of the day, the Baltimore Orioles trade onetime 20-game winner Pat Dobson, power-hitting second baseman Dave Johnson, and two other players to the Atlanta Braves for catcher Earl Williams and infielder Taylor Duncan. In another deal, the Kansas City Royals acquire future hitting star Hal McRae and pitcher Wayne Simpson from the Cincinnati Reds for outfielder Richie Scheinblum and pitcher Roger Nelson.