Dublin

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Rory McIlroy, of Northern Ireland, reacts to his shot from the 13th fairway during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Rory McIlroy, of Northern Ireland, hits out of a bunker on the 18th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Jay LaPrete)

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Jason Day, of Australia, hits out of a bunker on the 18th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Jay LaPrete)

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Phil Mickelson hits out of a bunker on the 13th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Phil Mickelson runs out of a bunker following his shot on the 13th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Jason Day, of Australia, putts on the ninth hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Jay LaPrete)

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Bill Haas watches his second shot from the 13th fairway during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Jordan Spieth hits from the 13th fairway during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Justin Leonard watches his tee shot on the 14th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Rickie Fowler hits from the ninth fairway during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Gonzalo Fernandez-Castano, of Spain, watches his shot from the 14th fairway during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Mike Weir, of Canada, hits from the ninth fairway during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Rory McIlroy, of Northern Ireland, hits from a bunker on the 14th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Adam Scott, of Australia, tees off on the 15th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Jason Day, of Australia, tees off on the 15th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Darron Cummings)

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Phil Mickelson reacts after making double bogey on the 17th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Jay LaPrete)

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Phil Mickelson reacts to leaving his chip shot short on the 17th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Jay LaPrete)