VIDEO: Mickelson, Spieth, McIlroy trade jokes during friendly round

With plenty of birdies and eagles expected at Whistling Straits this week, surely the chirps will be flying at the PGA Championship too.

And who better to orchestrate them than Phil Mickelson?

Devoid of a U.S. Open trophy, which Jordan Spieth had said he planned to lug around during Tuesday's friendly round with "Lefty," Mickelson let the youngblood know where he'd left his Wanamaker Trophy from 2005.

Mickelson couldn't dish it out to McIlroy about winning the PGA Championship, since McIlroy's done it twice before, so he joked about the Northern Irishman's injured ankle instead.

McIlroy was quick to turn it around.

Laugh while you can, fellas. Round 1 is Thursday.