"This marks the 21st time in World Series history a team has won the
first three games. Of the previous 20 times, there have been 17 sweeps.
The last team to lose a Game 4 after winning the first three in the World Series
came in 1970. Baltimore ended up winning that series in five games over
Cincinnati. No team has even managed to make it to a sixth game after losing
the first three in the World Series."
From sportsnetwork