Paul Casey chips to the 11th green during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Jay LaPrete)
Chris Kirk tees off on the 17th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Jay LaPrete)
Michael Thompson hits his approach shot on the 18th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Jay LaPrete)
Keegan Bradley lines up his putt on the 18th hole during the first round of the Memorial golf tournament Thursday, May 29, 2014, in Dublin, Ohio. (AP Photo/Jay LaPrete)