1966 Major League Baseball season

On April 12, the Braves ushered in Atlanta–Fulton County Stadium with the Pittsburgh Pirates taking a 3–2 win in 13 innings.

On May 8, the St. Louis Cardinals closed out old Sportsman's Park/Busch Stadium I with a 10–5 loss to the San Francisco Giants before opening the new Busch Memorial Stadium four days later with a 4–3 win in 12 innings over the Atlanta Braves.

In the World Series the Baltimore Orioles defeated the Los Angeles Dodgers four games to zero.

1 American League Triple Crown Batting Winner 2 National League Triple Crown Pitching For the first time, NBC became exclusive national TV broadcaster of MLB.

The New York Yankees and Philadelphia Phillies, which had instead sold their TV rights to CBS in prior seasons, also joined NBC's package.