Conversation so far:
when did the one game wild card start
The wild card was first instituted in MLB in 1994.
Which 2 leagues participate in the wild card game
The American League of Professional Baseball Clubs and the National League of Professional Baseball Clubs participate in the wild card games.
Who are the teams that are qualified to participate in the wild card game
In Major League Baseball, the wild card teams are the two teams in each of the two leagues that have qualified for the postseason despite failing to win their division.

Question: When did the modification take place
Self-contained rewrite: When did the modification to the one game wild card system take place