Has the baseball World Series ever been won in 4 games?

Answer 1

No -- the best is three games, done more than once.

John Wetteland had four SAVES for the New York Yankees in the 1996 World Series. It may seem strange that, right after doing so, Wettland was released by the Yankees. However, his replacement, Mariano Rivera, hasn't done so badly as a reliever.

Answer 2

Yes. There have been eighteen World Series 4-game sweeps.

Answer 3

There have been eighteen World Series 4-game sweeps.