Minus the water drained from the bag, the bass weighed 29 pounds, 8 ounces, and Grigsby was leading the 2011 season opener with a two-day total of 43-15. He was more than 8 pounds in front of Kevin VanDam, who remained consistent with a Friday catch of 18-3 for 35-12 over two days.
The field was cut to 50 for Saturday's round of the Bassmaster Elite Series season opener on the Harris Chain, with the final on Sunday, when the winner will claim $100,000 and instant qualification for the 2012 Bassmaster Classic.
Pierre Part's Cliff Crochet jumped from 23rd to eighth place with a two-day total of 29-10.
It was a great showing near home for the Gainesville, Fla., pro, who lifted his 10-pound anchor fish for the crowd. Grigsby, whose eight Bassmaster wins include two in his home state, later related how he landed the lunker while he was sight-fishing in an area shared with two other Elite pros.
"I just spotted her and she was a real tough female. I didn't mess with the male, and just kept working on her," Grigsby said. "Finally she got flustered and smacked it, and I set the hook and fought her around. I'd barely hooked her. She was just hanging by a thread."
It was his 7-pounder that snapped his rod. Both were fish he first saw Friday, thanks to a weather change that brought sunny skies, enabling him to see the fish.
"It was catch one here, one there, another hour and catch another," Grigsby said. "All in the same area."
It was an area Grigsby shared with first-day leader Pat Golden, who slipped to fourth with 31-10 for the two days.
For Golden, his day was all about the big one that bit his bait in half, but would not take the hook.
"I worked that fish for about 45 minutes," he said. "For some reason or another, she tasted the bait, and she just started cutting big circles and spooked off. It was weird; I guess she didn't like my tube bait."
Golden likes his chances for tomorrow in the same canal.
"It's apparent we're in a good area," he said. "Both me and Shaw are catching them, and we should tomorrow, too."
VanDam, more than 8 pounds behind, said he changed his entire approach on Friday, but he ended much the same, with 18-3 compared to 17-9 on Thursday.
"But it worked out," said VanDam, who last month won the Bassmaster Classic, his fourth Classic title and 20th Bassmaster tournament win. "I had a much better day as far as getting bit. I was pretty excited about that; I wanted to have something no matter what the conditions were. My area of yesterday had 4-foot waves today. I had to totally change areas and my approach.
"I can't compete with that right there," he said, pointing to Grigsby's 29-8, "but I'm going to do the best I can."
Browning, slipping one place to third, was satisfied with his day.
"I'm hoping some of these sight fishermen are going to run out," said the pro from Hot Springs, Ark. "That's going to be the big thing for me to win this thing."
Rounding out the top five was Chris Lane of Alabama, who grew up fishing Florida waters. He tapped into that knowledge to lift himself from 13th place.
"Do I need to go sight-fishing? That is my big question," he said. "I'm saying no. [I will] see if I can't just keep grinding it out and get another 15 to 17 pounds on Saturday."