Hunter Mahan watches his approach shot on the 15th hole during the first round of the PGA Colonial golf tournament in Fort Worth, Texas. Thursday, May 22, 2014. (AP Photo/LM Otero)
Adam Scott watches his tee shot on the third hole during the first round of the PGA Colonial golf tournament in Fort Worth, Texas. Thursday, May 22, 2014. (AP Photo/LM Otero)
Adam Scott reacts to missing a putt on the first hole during the first round of the PGA Colonial golf tournament in Fort Worth, Texas, Thursday, May 22, 2014. (AP Photo/LM Otero)
Jimmy Walker watches his tee shot the the second hole during the first round of the PGA Colonial golf tournament in Fort Worth, Texas. Thursday, May 22, 2014. (AP Photo/LM Otero)
Tim Wilkinson watches his tee shot on the 12th hole during the first round of the PGA Colonial golf tournament in Fort Worth, Texas. Thursday, May 22, 2014. (AP Photo/LM Otero)
Tim Wilkinson reacts to just missing his putt on the 12th hole during the first round of the PGA Colonial golf tournament in Fort Worth, Texas. Thursday, May 22, 2014. (AP Photo/LM Otero)
Matt Kuchar reacts to missing a putt on the first hole during the first round of the PGA Colonial golf tournament n Fort Worth, Texas, Thursday, May 22, 2014. (AP Photo/LM Otero)
Tim Wilkinson watches his tee shot on the 13th hole during the first round of the PGA Colonial golf tournament in Fort Worth, Texas, Thursday, May 22, 2014. (AP Photo/LM Otero)
Tim Clark puts on the 15th hole during the first round of the PGA Colonial golf tournament n Fort Worth, Texas. Thursday, May 22, 2014. (AP Photo/LM Otero)
Jimmy Walker waves after sinking his putt on the first hole during the first round of the PGA Colonial golf tournament n Fort Worth, Texas. Thursday, May 22, 2014. (AP Photo/LM Otero)
Dustin Johnson watches his tee shot on the 18th hole during the first round of the PGA Colonial golf tournament in Fort Worth, Texas, Thursday, May 22, 2014. (AP Photo/LM Otero)