© 2011 MLB Advanced Media, L.P. All rights reserved.

09/17/11 11:31 PM ET

Phils' NLDS opponent pending as races are run

If season ended Saturday, Philadelphia would face Arizona

PHILADELPHIA -- A fifth consecutive National League East championship had been a formality for the Phillies for months.

Their opponent in the National League Division Series is far from final.

If the season ended Saturday, the Phillies would play the NL West champion Arizona Diamondbacks in the first round of the postseason. The NL Central champion Milwaukee Brewers would play the NL Wild Card champion Atlanta Braves.

Of course, the Phillies are the only NL team that has clinched a postseason berth, so some of those teams can change. Because teams from the same division cannot meet in the NLDS, the Phillies cannot play the Braves in the first round. That means they will play the division champion with the worst record. The Brewers are 89-63, while the Diamondbacks are 87-65.

The Diamondbacks won two of three against the Phillies at Chase Field in April, but dropped two of three to the Phillies at Citizens Bank Park in August. Their only victory against the Phillies in August came when Roy Halladay blew the only ninth-inning lead of his career.

The Phillies just took three of four from the Brewers last weekend at Miller Park, although the Brewers won two of three at Citizens Bank Park in April.

No matter who the Phillies play, they will be the heavy favorites, although they are quite aware nothing is guaranteed. They had the best record in baseball last season, but lost to the San Francisco Giants in the NL Championship Series.

"I'm not really going to be satisfied until we win that last game," Phillies right-hander Roy Oswalt said. "I've done enough personal stuff that it really doesn't matter. All I want now is to win that last game. That's all any of us really want."

Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.