"It's still sinking in", Frittelli said after the round, via Golfweek.com.
Cameron Tringale and Andrew Landry earned a share of the one-stroke lead after the third round at the John Deere Classic.
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He won twice on the European Tour in 2017 but this is his first full season on the PGA Tour.
Frittelli, who opened with rounds of 66, 68, and 65, started the final round with three straight birdies.
Henley put pressure on Frittelli after rocketing up the standings with the low round of the day - a 10-under-par 61 at TPC Deere Run. I'll jump on that plane over to the Open Championship and hopefully be calm when I get there.
Landry - victor of last year's Texas Open - is also 16 under through 54 holes following a round which included six birdies and a pair of bogeys on the back nine.
He finished in solo second (19 under) for his first top-10 finish of the season hitting a number of other milestones on the way. He again caught momentum with birdies on 14th, 17th and 18th and finished at 68.
Rookie Collin Morikawa (66), the runner-up last week at the 3M Open, hit all 18 greens in regulation, and he was Tied-fourth.
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She is due to transit the United States again at the end of her trip next week. President Donald Trump's trade dispute with Chinese counterpart Xi Jinping.
Callum Hudson-Odoi: Frank Lampard wants Chelsea winger to sign new deal
They now have to make the difference. "And we now have a big batch of them that are fighting to get into the first team". He believes Odoi will be an important player for both Chelsea and England in the future.
Declines in trading: Goldman Sachs reports dip in 2nd quarter profits
However, Goldman saw a 16% year-over-year surge in investing & lending, which checked in at $2.53 billion for the second quarter. Net revenues of $1.47bn in Fixed Income, Currency and Commodities (FICC) Client Execution were 13% lower compared to a year ago.
Meanwhile, South Korea's Kim Sei-young fired a bogey-free seven-under par 64 to seize a one-stroke lead over compatriot Lee6 Jeong-eun after Friday's second round of the LPGA Marathon Classic.
Haas closed with a 67, and Tim Petrovic shot 68.
Six shots ahead of Thompson after the birdie run, Kim played the final seven holes in even par, offsetting a birdie on 15 with a bogey on 1.
Stacy Lewis was third at 16 under after a 66.
Parel had a 73 to tie for fourth with Kent Jones (71) at 2 under. The 26-year-old South Korean player has nine tour titles, also winning the LPGA MEDIHEAL Championship in May in California.
European - Bernd Wiesberger beat Benjamin Hebert on the third playoff hole at the Scottish Open in North Berwick, Scotland, for his sixth European Tour title.
On the par-4 fifth, Garnett's 164 yard approach to 5 feet set himself up for the birdie on the hole.
Lahiri has not qualified for The Open next week and is skipping the Barbasol Championships.