Hicks, the second-round leader, had a 67 to match Hahn at 12-under 201.
The top 60 on the money list qualified for the season-ending event at TPC Craig Ranch, and the final top 25 will earn 2013 PGA Tour cards. Hahn and Hicks have already wrapped up tour cards, with Hahn 13th on the money list, and Hicks 11th.
"It was a good day but I'm not going to say it was a great day," said Hahn, the Rex Hospital Open winner in June in Raleigh, N.C. "I was even on the par 5s. ... It's all about taking home a trophy. I believe it would be contagious and it would be nice to take home some hardware and just build on it."
The winner will receive $180,000 from the $1 million purse.
"Tomorrow is my birthday," said Hicks, who will be 38. "I've got my family out, so it's a good week regardless. ... You know in the back of your head that if you have a good week, whether you win or not, it can really springboard you ahead of some people. If somebody catches you, so be it. ... The best defense is a good offense. I can't say there was ever a round where I told somebody we made too many birdies."
Justin Bolli was two strokes back after a 67. He's 44th on the money list.
Michael Putnam, 30th on the money list, was fourth at 9 under after a 67.