Michael Phelps signs golf deal with Ping

Phelps got a tour of Ping's Arizona facilities, where he was fitted for a set of clubs that accommodate his 6-foot-4 height, long arms and large hands. He's already noticed a big improvement in the flight of his ball.

"It's pretty wild," he told The Associated Press. "It's crazy to think this sport is so technical. A lot of sports are very technical, but one of the (Ping) guys said there's 50-something different shafts they can put on the clubs. I'm used to having a pair of goggles, a small, medium or large swim cap, and a jammer to put on, and that's it."

Ping added a few special touches to Phelps' clubs, including accents in both gold and red, white and blue.

"We've custom-built his clubs to ensure he has every chance to improve, and we believe he'll dedicate himself to golf with the same intensity he gave to swimming," said John A. Solheim, the company's chairman and CEO. "His global presence as a golfer will bring Ping tremendous exposure and just as importantly, shed additional light on the game in general."

Phelps played with Masters champion Bubba Watson in the pro-am.

"You can see he's an athlete and he's competitive, so he could be good if he practiced and put some time into it," Watson said. "Any athlete of that level has a chance to be good at another sport."

Phelps' tee shot on the par-3 16th hit the green, but rolled off the front amid boos from the rowdy fans on the stadium hole.