Webb Simpson and Bryson DeChambeau were trading birdies with vastly different games, Rory McIlroy ran off enough birdies to make the cut and the biggest move of the day at the RBC Heritage belonged to a player who made it to the course, but not the tee.
Nick Watney became a footnote in golf history on Friday as the first player to test positive for the coronavirus.
Watney tested negative when he arrived earlier in the week, experienced symptoms on Friday and took another test that came back positive, and he now faces self-isolation for at least 10 days as the tournament goes on.
On the course, Simpson got the last word with a six-foot birdie on his final hole at No.9 for another six-under 65, giving him a one-shot lead after another day of watching DeChambeau and his additional 40 pounds of mass swing out of his shoes for a 64.
DeChambeau made six birdies on his back nine, missing a five-footer on the last that would have tied for the lead.
Corey Conners also was one back after a bogey-free 63.
"It's very satisfying knowing I'm not near as long as some of these guys and I'm able to kind of use my skills of distance control and shot shape to pick me back up when I'm 40 yards or 30 yards behind these guys," Simpson said.
"I would like to hit it further. I set out on a journey three years ago to get stronger, hit it further, but do it a lot slower than Bryson. But he's made it look easy and seamless."
Simpson was at 12-under, and scoring remained bunched.
Thunderstorms that rolled through the island and halted play for two hours only gave players more time to talk about Watney and the ramifications.
McIlroy shot 66 to make the cut with one shot to spare, while Brooks Koepka was three shots behind after a 66.
The only Australian to make the cut was Matt Jones, who sits eight shots off the lead at four-under.