In baseball, what is a "rubber game"?

Question

First right answer wins.

Answer 1

The rubber game of any series in any sport is the tie-breaker game, the one that will determine the winner.  In baseball, you hear it often referred to in a three-game series if the teams split the first two.  You also often hear it referred to in card games like whist or bridge.

(Actually, I -never- hear anyone refer to those games at all, because I don't know anyone who plays them, but in circles where people do, you hear it.)

Answer 2

Taken from Rubber bridge, the term rubber game is used to describe the deciding game of a series. Generally the term is not used to describe the deciding game of a playoff series, but is normally limited to describing the third game of a three game regular season series when the two teams have split the first two games.