Ryder Cup celebrity rounds are in full swing and with the likes of Bill Murray and Michael Phelps for the Americans and Niall Noran for the Europeans, it is sure to be a fan favorite early in the Ryder Cup week.
Watch: Michael Phelps uses golf medal as ball marker!
On the first tee box in the celebrity round, the worlds most decorated Olympian stepped up to the tee and pulled out his famous arm-swing swimming warm up routine, much to the delight on the USA fans. Check it out!
