Phil Mickelson

Among the best players in the world, the 150th Open Championship began this morning at St. Andrews.

It will be Phil Mickelson who is on the course this weekend.

Since defecting from the PGA Tour for LIV Golf Series, the lefty has been dominating headlines.

Today, he continued that trend. In his social media posts, Mickelson wore a t-shirt under a quarter-zip sweatshirt.

There were many fans who couldn't resist giving their opinion on the game.

The open is being played on a course that everyone knows and loves. Crazy!" one fan wrote.

According to another fan, "Phil went from celebrity to nobody in a matter of a year. He hasn't been on the news today."

"When you had blackjack on the cards but a tee time opened up at The Old Course last minute," another fan laughed.