Leading first-round scores on Thursday in the US PGA Tour Phoenix Open at TPC Scottsdale in Arizona (USA unless noted, par-71): 61 - Wyndham Clark 63 - Billy Horschel 64 - J.B. Holmes 65 - Tom Hoge, Harris English, An Byeong-hun (KOR), Bud Cauley 66 - Nate Lashley, K.J. Choi (KOR), Im Sung-jae (KOR), Adam Long, Hudson Swafford 67 - Branden Grace (RSA), Kang Sung (KOR), Xander Schauffele, Jon Rahm (ESP), Hideki Matsuyama (JPN), Scott Piercy, Brandon Hagy, Keegan Bradley, Zach Johnson, Patrick Rodgers afp