Friday's key games to watch (all times ET)
Cardinals (Carpenter, 0-0) at Cubs (Volstad, 3-10), 2:20 p.m. Preview >
Braves (Hanson, 12-8) at Phillies (Kendrick, 9-11), 7:05 p.m. Preview >
Brewers (Marcum, 5-4) at Nationals (Jackson, 9-10), 7:05 p.m. Preview >
Dodgers (Blanton, 1-4) at Reds (Arroyo, 12-8), 7:10 p.m. Preview >
Pirates (Locke, 0-1) at Astros (Gonzalez, 2-1), 8:05 p.m. Preview >
D-backs (Miley, 15-10) at Rockies (Pomeranz, 1-9), 8:10 p.m. Preview >
Padres (Kelly, 2-1) at Giants (Vogelsong, 12-9), 10:15 p.m. Preview >
If the postseason started today ...
This is how the teams would match up: Postseason Bracket »
To calculate a team's magic number, take the number of games it has remaining and add one. Then subtract the difference in the number of losses between that team and its closest pursuer.
A tiebreaker game will be played to determine a division winner, even if the tied clubs are assured of participating in the postseason. If a division championship tiebreaker is necessary, the head-to-head record between the clubs will determine home-field advantage. If the head-to-head record is tied, then the division record will be the next tiebreaker.
If two clubs are tied for the two Wild Card berths, home-field advantage will be determined by the head-to-head record between the clubs. If the head-to-head record is tied, then the division record will be the next tiebreaker.
Tiebreaker rules »
2012 postseason schedule
Wild Card playoff games: Oct. 5
Division Series: Oct. 6-12
AL Championship Series: Oct. 13-21
NL Championship Series: Oct. 14-22
World Series: Oct. 24-Nov. 1