Pooley, who shared the first-round lead with Roberts and Tom Watson after matching the Hualalai record with a 63, had a 17-under 127 total on the Jack Nicklaus-designed course to tie the tour's 36-hole record for relation to par.
'I love that,' said Pooley, who has 17 birdies and 19 pars. 'It's been a dream to win the first tournament of the year, some year. I've played for 30 years and haven't done that. This is a great opportunity for me.
The 54-year-old Pooley, seeking his third victory on the 50-and-over tour, had five straight birdies on Nos. 3-7 and also birdied Nos. 11-13 before closing his bogey-free round with five consecutive pars. He also had five straight birdies Friday.
'If I can keep making five birdies in a row, that would be great. I always have a great attitude here and love playing here. If you win the first tournament, the pressure is off and you're playing with the house's money.'
Roberts shot a 67. The 50-year-old putting star, coming off an 18th-place tie last week in the PGA Tour's Sony Open in Hawaii, overcame a double bogey on the par-3 fifth.
'I started out pretty good,' Roberts said. 'But that fifth hole is one of the hard ones and I made a poor swing and hit a flare into the lake. I wasn't that upset. It was early in the round and could still make some birdies.
'I played just like I did the first day, except for the two bad swing at the fifth and one at the ninth that led to a bogey. If I make par on those two holes, I shoot exactly the same as the first round.'
Jay Haas (64) and D.A. Weibring (65) were four strokes back at 13 under. Watson had a 69 to drop into a fifth-place tie with Fuzzy Zoeller (67) at 12 under.
Gil Morgan had the best round of the day, matching the course record with a 63. After opening with a front-nine 41 on Friday, the 1998 tournament champion played the next 27 holes in 15 under to reach 10 under.
'I was just trying not to be embarrassed,' Morgan said. 'I just went out and tried to make as many birdies as I could. It's a lot better feeling today than yesterday.'