Kuchar opened with consecutive rounds of 63 this week.
"To shoot seven under back-to-back is unexpected, but awfully excited, " Kuchar said.
But he remained tied fifth - as he started the day - with American leader Matt Kuchar (66) now seven shots in front of him after getting to 18-under 192, the lowest 54-hole score of his career. He also had a 126 in Las Vegas in 2008.
Putnam, who trailed by one stroke at the halfway stage, shot a three-under 67 to get to 16 under overall.
Steve Buscemi's Wife Jo Andres Has Passed Away At 65
Andres was known for her work in New York's downtown scene in the '80s at such venues as the Performing Garage and P.S. 122. A cause of death has not been made public, and a representative for Buscemi has not yet commented on the news.
It was a short week for Spieth after a long break. Putnam missed an 8-foot birdie attempt on No. 18. "It is the golf I like to play to stay out of trouble", he said. "I feel like I was trying to win the tournament trying to make the cut, which is not something I want to get used to".
He returns in two weeks at Torrey Pines.
Andrew Putnam was two shots behind after a 67. The Saitama native fell three places down the leaderboard following his opening round of 65.
"I loved the fight", Spieth said. "I want to do my best to aim for a top-10 finish". He closed with a birdie Saturday to cut Kuchar's lead to just two.
Now, No. 9 could arrive just two months later. Never expected it to go in. "You're always surprised when they drop".
Anthony 'The Mooch' Scaramucci joins 'Big Brother: Celebrity Edition'
The 12 of them will be competing for the show's $250,000 prize, which will be awarded when the season finale airs on February 13. Scaramucci has continued to be a consistent presence on cable news since then, coming on to talk about the President.
Chez Reavie made history with three eagles on par-4 holes during the second round at the Sony Open in Hawaii on Friday.
"Honestly, I didn't think about it at all until after the third one went in", Reavie added.
Cink made nine birdies in his round of 62. Marc Leishman (64) and Ted Potter Jr. Check in for highlights from every tournament plus player interviews, player profiles, tournament previews, swing analysis and all the greatest shots and unbelievable moments.
The 40-year-old is aiming for his second win in three starts on the Tour after claiming the Mayakoba Golf Classic earlier this season.
Kuchar has been one of the most consistent players on the Tour over the past few years, finishing in the top 20 in FedEx Cup standings in 2017, 2016 and 2015. He felt as though he was grinding too hard, and that's not a trait he wears well.
Jalen Hurts visits Oklahoma day after Maryland
The quarterback was seen at Maryland on Friday and was expected to visit Miami today, though that visit hasn't been confirmed. On Friday night, Hurts was spotted with former Alabama offensive coordinator Mike Locksley at a Maryland-Indiana game.