With the Houston Astros set to enter the American League in 2013, MLB Commissioner Bud Selig continues to try and expand baseball's postseason.
Just this weekend, Selig called an expansion of MLB's wild card system, "Pretty definite ... Clubs really want it."
Selig is pushing for a second wild card to be added to both the AL and NL in time for the 2012 postseason, meaning an expansion from eight to 10 teams that would make the postseason this year.
If that happens, just as the St. Louis Cardinals won the 2011 World Series and the Anaheim Angels won the 2002 World Series, yet one more team per league has a shot at winning a pennant and possibly a championship.
As far as the 2012 National League is concerned, that means the NL West could send up to three teams to the postseason, just as the NL East and Central could send three of their own instead.
Most likely, two NL divisions in 2012 would send two teams each to the playoffs—one division winner and one wild card team.
The NL East and NL West are shaping up to be those two divisions, something that would bode well for the Diamondbacks if the San Francisco Giants come back to compete for first place in the NL West.