With the tour's biggest names otherwise engaged at the signature RBC Heritage in South Carolina, it will be an important final round for many players.
Joel Dahmen leads by three shots after carding a one-under-par 71 on a windy Saturday to get to 17 under 199.
Chan Kim (69), Michael Thorbjornsen (70) and South Africa's Garrick Higgo (70) are tied for second.
A four-time winner from 535 tournaments played on the tour he joined in 2003, 44-year-old Baddeley has not triumphed since the 2016 Barbasol Championship and has a world ranking of No.373 these days.
But he produced a 70 in the third round to be tied 11th at 10 under.
Dahmen bogeyed two of his first five holes and added another bogey in his toughest round of the weekend, but finished with four birdies and sits at 17-under 199.
"It was a challenge, for sure," Dahmen said. "It's always tough teeing off with a bigger lead. I feel like I hit some good shots early that didn't end up in a good spot. Then I screwed up all the easy stuff early, so really frustrating."
With the low round of the day at 66, Vince Whaley moved up 17 spots into a tie for fifth with Ben Martin (67) and Germany's Jeremy Paul (67).
Whaley overcame a bogey on the par-5 fourth hole with seven birdies, including three out of four holes on the front nine as he seeks his first PGA Tour victory.
"I think guys are so good," Whaley said. "I know this is opposite field event or whatever, but everyone's so good, you've got to go out there and still attack. It's going to be even windier tomorrow but there's no slowing down, you've got to keep going and just see how low you can go."
- with AAP
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