Phil Mickelson trash-talked Jordan Spieth at the Open Championship — and Phil is going to have to eat his words

Phil Mickelson is known far and wide for being one of golf's greatest champions — and one of the sport's biggest trash talkers. But the 47-year-old may have run his mouth one to many times at last week's Open Championship.

In 2013, Mickelson won his first and only British Open title after shooting a legendary final round of 66. The victory earned him the Claret Jug in addition to several privileges, including an exemption into the event through age 60 and a spot in the champions' section of the locker room.

It was that last perk that led to Mickelson's latest quip. The veteran was preparing for a practice round when he decided to mess with one of the game's elite players. According to The Telegraph:

"The 47-year-old was in his normal playful demeanor, spotting Jordan Spieth walking into the wrong section of the locker room and telling his young countryman: 'This right here is for past champions.'"

Spieth must have really wanted a spot in that champions' locker room, because he promptly delivered a performance for the ages at Royal Birkdale. The Texan was the only player in the field to shoot four rounds in the 60s, and on Sunday afternoon, he became just the sixth player ever to go wire-to-wire at the Open Championship.

Mickelson has referred to his British Open win as his "greatest accomplishment," however he didn't earn a spot in the champions' locker room until he was 43. Next year, Mickelson is going to have to share the area with the 24-year-old Spieth.

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