Cardinals' walk-off win is unprecedented

Jeff Curry/USA TODAY Sports

The Cardinals are the first team to win a World Series on an error since 1986.It was a World Series game that ended in a way we’ve never seen before.

The St. Louis Cardinals won after Allen Craig scored on an obstruction call at third base. Jon Jay grounded into a fielder’s choice, as Dustin Pedroia threw Yadier Molina out at home. As Craig approached third base, Red Sox catcher Jarrod Saltalamacchia threw the ball past third baseman Will Middlebrooks. Craig tripped over Middlebrooks and was tagged out attempting to come home, but obstruction was called, which resulted in Craig scoring the game-winning run.

It was the first postseason game ever to end on an obstruction error, according to the Elias Sports Bureau.

From the MLB rule book:

Rule 2.00

OBSTRUCTION is the act of a fielder who, while not in possession of the ball and

not in the act of fielding the ball, impedes the progress of any runner.

Rule 2.00 (Obstruction) Comment: If a fielder is about to receive a thrown ball and if the ball is in flight directly toward and near enough to the fielder so he must occupy his position to receive the ball he may be considered "in the act of fielding a ball." It is entirely up to the judgment of the umpire as to whether a fielder is in the act of fielding a ball. After a fielder has made an attempt to field a ball and missed, he can no longer be in the "act of fielding" the ball. For example: an infielder dives at a ground ball and the ball passes him and he continues to lie on the ground and delays the progress of the runner, he very likely has obstructed the runner.

World Series Games to End on an Error

It was the first time the Red Sox lost a World Series game on a walk-off since Game 6 of the 1986 World Series against the Mets -- aka “the Buckner game."

It was only the fourth World Series game ever to end on an error, the first since that same Mets-Red Sox game in 1986.

The Cardinals, leading the series 2-1, are in the driver’s seat. According to Elias, 16 of the 18 teams to win Game 3 of the World Series after the series was tied 1-1 went on to win the series.