Jordan Spieth

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From left, Dustin Johnson, Wayne Gretzky and Jake Owen watch Jordan Spieth putt on the 11th green of the Spyglass Hill Golf Course during the second round of the AT&T Pebble Beach National Pro-Am golf tournament Friday, Feb. 10, 2017, in Pebble Beach, Calif. (AP Photo/Eric Risberg)

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Jordan Spieth follows his drive from the 11th tee of the Spyglass Hill Golf Course during the second round of the AT&T Pebble Beach National Pro-Am golf tournament Friday, Feb. 10, 2017, in Pebble Beach, Calif. (AP Photo/Eric Risberg)

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Spectators watch the playing group of Dustin Johnson, Jordan Spieth, Wayne Gretzky and Jake Owen as they hit from the third tee of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. 9, 2017, in Pebble Beach, Calif. (AP Photo/Eric Risberg)

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FILE - In this July 12, 2016, file photo, Jordan Spieth, of the United States, gives autographs to fans as he makes his way to the fifth tee during a practice round for the British Open Golf Championships at the Royal Troon Golf Club in Troon, Scotland. Spieth wants to ‘flip the switch’ for the fans, but not for those trying to make money off his autograph. (AP Photo/Matt Dunham, File)

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Jordan Spieth urges his ball to slow after hitting from the third tee of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. 9, 2017, in Pebble Beach, Calif. (AP Photo/Eric Risberg)

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Jordan Spieth hits from the first fairway during the final round of the Waste Management Phoenix Open golf tournament, Sunday, Feb. 5, 2017, in Scottsdale, Ariz. (AP Photo/Matt York)

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Jordan Spieth tries to coax a putt on the second hole during the third round of the Waste Management Phoenix Open golf tournament Saturday, Feb. 4, 2017, in Scottsdale, Ariz. (AP Photo/Ross D. Franklin)

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Jordan Spieth reacts to his shot from the 15th fairway during the second round of the Waste Management Phoenix Open golf tournament, Friday, Feb. 3, 2017, in Scottsdale, Ariz. (AP Photo/Matt York)

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Rickie Fowler, second from right, shakes hands with Jordan Spieth, second from left, as they are joined by Jon Rahm, left, of Spain, and caddie Joe Skovron, right, during the first round of the Waste Management Phoenix Open golf tournament Thursday, Feb. 2, 2017, in Scottsdale, Ariz. (AP Photo/Ross D. Franklin)

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Jordan Spieth hits out of a fairway bunker on the 18th hole during the first round of the Waste Management Phoenix Open golf tournament Thursday, Feb. 2, 2017, in Scottsdale, Ariz. (AP Photo/Ross D. Franklin)

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Justin Thomas, left, Michael Greller, center, and Jordan Spieth share a laugh on the 12th green during the first round of the Sony Open golf tournament, Thursday, Jan. 12, 2017, in Honolulu. Greller is Spieth's caddie for the tournament.(AP Photo/Marco Garcia)

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FILE- In this April 10, 2016, file photo, defending champion Jordan Spieth, rear, helps 2016 Masters champion Danny Willett, of England, put on his green jacket following after Willett won the Masters golf tournament in Augusta, Ga. (AP Photo/Jae C. Hong, File)

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Tour Championship golf tournament defending champion Jordan Spieth hits sand shots to the practice green while preparing to defend his title at East Lake Golf Club in Atlanta, on Tuesday, Sept. 20, 2016, (Curtis Compton/Atlanta Journal-Constitution via AP)