A Major League Baseball playoff bracket is the pairing of teams that meet in the postseason. Since an additional wild card team was added in 2012, there are four rounds to the playoff brackets as of 2015.
The brackets are separate for American League and National League playoff teams. The brackets begin with the pairing of the two AL wild card teams and two NL wild card teams, who meet in single-elimination games. The winners from both leagues advance to the divisional round.
In the divisional round, the remaining wild card teams in each respective league play the team with the best record in each league. The other two division champions face one another. The two winners of the divisional round from each league meet in the league championship series.
The winners of that bracket claim the NL and AL pennants, and they face each other in the final round, known as the World Series.