Second-round leader Brad Adamonis posted a 2-under 69 in the third round and is alone in second place at 13-under-par 200. Boo Weekley carded a 64 to move into a share of third place at minus-12. He was joined there by two-time winner this year Johnson Wagner (67).
Daley got on the board with a birdie on No. 3. He then converted back-to-back birdies from the par-4 fifth to get to 10 under. Daley collected another birdie at the ninth.
The 27-year-old chipped in for birdie on the par-3 11th and made it two in a row as his birdie effort on the 12th found the bottom of the cup.
Daley picked up another birdie on the par-5 15th to climb to minus-4. Three holes later, he notched his final birdie of the day.
'Today was a lot of fun. I had a great first round and today's round was great,' said Daley, who shared the lead after round one with Wagner. 'I played really well Friday too, I just didn't get much out of it.'
Daley will go for his first tour win on Sunday.
'I've put myself in pretty good position going into Sunday a few times this year,' Daley admitted. 'I haven't played great. I've been playing pretty well all year, I just need to got out tomorrow and keep doing the same thing.'
Adamonis, who led by three entering the round, parred the first 13 holes he played on Saturday. He birdied the par-5 14th to get to minus-12.
The 33-year-old Adamonis posted his second birdie on 17 at Glenmaura National Golf Club to get within two of Daley's lead.
'It was a steady grind, unlike the first two days when I hit the ball really well,' Adamonis said. 'I made some nice clutch putts and some nice up and downs. It was a pretty good round for not hitting the ball great.'
Cliff Kresge matched the 63 of Daley to climb into a tie for fifth place at 11-under-par 202. He stands alongside Bryce Molder and Roland Thatcher, who both shot 64, Brendon De Jonge (65) and Richard Johnson (67). Jay Williamson is alone in 10th at minus-10 after a 5-under 66 in the third round.