2015 AT&T Byron Nelson

IRVING, TX - MAY 28: Zach Johnson hits his tee shot on the 16th hole during Round One of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 28, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 28: Sangmoon Bae of Korea looks on with his caddie from the tee box on the 16th hole during Round One of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 28, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 28: Graham DeLaet of Canada looks on with his caddie on the 15th hole during Round One of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 28, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 28: Jason Dufner hits his tee shot on the 15th hole during Round One of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 28, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 28: Derek Fathauer hits his tee shot on the 15th hole during Round One of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 28, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 28: Jimmy Walker hits his tee shot on the 15th hole during Round One of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 28, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 28: Justin Thomas reacts to a putt on the second hole during Round One of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 28, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

IRVING, TX - MAY 28: Brooks Koepka hits his tee shot on the first hole during Round One of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 28, 2015 in Irving, Texas. (Photo by Sarah Crabill/Getty Images)

IRVING, TX - MAY 28: Jordan Spieth putts on the first hole during Round One of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 28, 2015 in Irving, Texas. (Photo by Sarah Crabill/Getty Images)

IRVING, TX - MAY 29: Grounds crew staff work to repair a flooded bunker on the 17th hole after heavy rains delayed Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

Grounds crew staff work to remove standing water on the 17th hole after heavy rains delayed Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

IRVING, TX - MAY 29: Keegan Bradley hits his tee shot on the 10th hole during Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

IRVING, TX - MAY 29: A CBS spotter measures the yardage on the 104 yard par three 14th hole during Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

John Rollins hits his tee shot on the 104 yard par three 14th hole during Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

Jordan Spieth hits his second shot on the 12th hole during Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

IRVING, TX - MAY 29: Jon Curran reacts to his tee shot on the first hole during Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

Divots are seen at the tee box on the 104 yard par three 14th hole during Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

A statue of Byron Nelson is seen during Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

Jordan Spieth looks on from the 12th hole during Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

Brooks Koepka hits a tee shot in the 14th hole during Round Two of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 29, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

Jordan Spieth hits his tee shot on the first hole during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

Peggy Nelson, widow of Byron Nelson, looks on from the tee box on the first hole during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

Jonathan Randolph tosses a ball before his tee shot on the first hole during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

Zach Johnson talks with Colt Knost on the first tee during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

Jordan Spieth and his caddie look on from the tee box on the first hole during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

Peggy Nelson, widow of Byron Nelson, looks on from the first hole during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

Jordan Spieth looks on from the tee box on the first hole during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

Jordan Spieth looks on from the tee box on the first hole during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

Nick Watney stretches before his tee shot on the first hole during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

Jon Curran looks on from the tee box on the first hole during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

Nick Watney looks on from the first hole during Round Three of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

IRVING, TX - MAY 31: Scott Pinckney hits his tee shot on the fourth hole during the Final Round of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 31, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 31: Jimmy Walker hits his tee shot on the fourth hole during the Final Round of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 31, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 31: Colt Knost hits his tee shot on the fourth hole during the Final Round of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 31, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 31: Dustin Johnson looks on from the fourth hole during the Final Round of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 31, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 31: Dustin Johnson looks on from the fourth hole during the Final Round of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 31, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 31: Jordan Spieth talks with his caddie at the tee box on the first hole during the Final Round of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 31, 2015 in Irving, Texas. (Photo by Sarah Crabill/Getty Images)

IRVING, TX - MAY 31: Steven Bowditch of Australia hits his tee shot on the third hole during the Final Round of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 31, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

IRVING, TX - MAY 31: Steven Bowditch of Australia smiles after winning on the 18th green during the Final Round of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 31, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)

IRVING, TX - MAY 31: Steven Bowditch of Australia tips his hat after winning on the 18th green during the Final Round of the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 31, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

IRVING, TX - MAY 31: Steven Bowditch of Australia and his wife Amanda pose with the trophy after his four-stroke victory at the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 31, 2015 in Irving, Texas. (Photo by Tom Pennington/Getty Images)

IRVING, TX - MAY 31: Steven Bowditch of Australia poses with the trophy after his four-stroke victory at the AT&T Byron Nelson at the TPC Four Seasons Resort Las Colinas on May 30, 2015 in Irving, Texas. (Photo by Scott Halleran/Getty Images)