Overnight rain softened the course to a degree, and when the first group teed off at 6:35 a.m., the rain was coming down pretty heavily.
Jordan Spieth, Brooks Koepka and Matt Kuchar -- who shot 29 over the first nine holes -- led the way with 65s.
He marked his return to competitive golf with a superb 65, which put him straight back into contention at a major.
A 70 percent chance of rain is predicted overnight, according to The Open's weather report, with a 40 percent of "showery outbreaks" through noon.
You control the ball off the tee, keep your hands dry and you grind from inside 10 feet or you make a midranger for par, something to keep the momentum going; that's important for tomorrow.