Phil Mickelson and Lee Westwood are offering reminders that the British Open doesn't discriminate against older players.

Maybe it's just one round, but Thursday at The Open, 50-somethings Lee Westwood and Phil Mickelson shot under par.

Jacob Skov Olesen and Haotong Li held the early Thursday lead at 4 under while Mickelson, 55, had his lowest opening round in an Open since 2016.

On banners and flags and buntings of grandstands there are images of the claret jug, a reminder of what's at stake at the British Open. But add this to the list of what makes golf's oldest championship so distinct from the other majors: Every year it feels like a new experience.

The Open Championship is the oldest golf tournament in the world, and the final men’s major championship of the season.