Jordan Spieth was locked in. Spieth shot a 5-under 65 to take and hang on to an early co-lead with U.S. Open champion Brooks Koepka at the 146th Open.
After making par at the first, Spieth pull-hooked his drive into some bumpy gorse off the second tee. From there, he hit an off-balanced approach that landed about 12 feet from the cup. He poured that in for birdie and never looked back.
Nobody shot a bogey-free round the last time the Open was here in 2008.
Bubba Watson, Hideki Matsuyama, and Ernie Els were in a group at two-under.
Adam Scott and Jason Day each finished the first round one-under while Dustin Johnson, Rickie Fowler and Rory McIlroy each finished at one-over after the first 18.
2:41 a.m. -- Ernie Els, Ross Fisher, Bernd Wiesberger
3:03 a.m. -- Zach Johnson, Jason Day, Sergio Garcia
3:25 a.m. -- Rickie Fowler, Adam Scott, Paul Casey
4:47 a.m. -- Rory McIlroy, Dustin Johnson, Charl Schwartzel
5:09 a.m. -- Phil Mickelson, Francesco Molinari, Marc Leishman
9:48 a.m. -- Henrik Stenson, Si Woo Kim, Jordan Spieth
9:59 a.m. -- Louis Oosthuizen, Justin Rose, Justin Thomas