Published: Sep 24, 2011 11:02 PM EDT
Updated: Sep 25, 2011 6:30 AM EDT

ATLANTA (AP) - Aaron Baddeley and Hunter Mahan are tied for the lead in a Tour Championship that now seems to have 10 million possibilities at East Lake.

Baddeley wanted to make one last impression to be considered for the Presidents Cup team and did just that Saturday. He ran off four straight birdies on the back nine and shot a 6-under 64 to claim a share of the lead.

Mahan didn't think he had a chance at the $10 million. But after rolling in a 20-foot birdie putt on the last hole for a 66, he is projected to finish atop the FedEx Cup and claim the richest prize in golf.

They were at 9-under 201, two shots clear of Jason Day and K.J. Choi.