The White Sox have agreed to a two-year, $29 million contract extension with Jake Peavy.

He went 11-12 with a 3.37 ERA in 219 innings and 194 strikeouts in 32 starts in 2012.

Peavy will receive $14.5 million in both 2013 and 2014 and if he reaches innings pitched thresholds, he can elect to extend the contract to include the 2015 season at a salary of $15 million.

The Nationals lost to the Phillies on Monday night, but they still clinched the National League East title.

The nation's capital will enjoy playoff baseball for the first time in 79 years. The Nationals celebrated the division title hardily on the field after the loss.

"This is incredible. The excitement. The joy. The fans. Smiles on everyone's faces, the excitement that's going on," Gio Gonzalez said. "Everyone here just witnessed history. Hopefully we can try to continue that journey."

Washington, in first place since May 22, leads Atlanta by three games with two to play. The Braves lost in the top of the ninth inning of the Nationals-Phillies game. The Nationals congratulated each other in their dugout with hugs, high-fives and spiked gloves.

"The way it happened tonight doesn't really matter," Ryan Zimmerman said. "We put ourselves in that position to have the luxury of having the other team have to play perfect baseball. We played a great 159, 160 games to get to that point, and we should be commended for that."

The Athletics clinched their first playoff berth since 2006 on Monday night with a 3-2 defeat of the Rangers.

Oakland is assured of a Wild Card berth, but they can still catch Texas for the American League West title if they win the final two games of the season.

"I don't think anybody outside of this team thought we'd be where we are today," Josh Reddick said.