A previous LIV Golf player rejoins the PGA Tour at The Open after his suspension ended and ankle monitor was removed only days before the event at Royal Birkdale.
The tournament began in dense brown mist at the English links course.
The incumbent champions played the same way they typically do in Round 1.
Rory McIlroy had a tough day.
He shot a 72 and sat well behind the leader at the end of the round.
Rain stopped play for a long spell early on.
Then wind picked up and made it difficult to score later in the day.
Officials kept close watch on the weather as gusts stayed strong and rain threatened for Friday.