Leading first-round scores on Thursday in the US PGA Tour Memorial Tournament at Muirfield Village in Dublin, Ohio (USA unless noted, par-72): 66 - Tony Finau 67 - Ryan Palmer 68 - Brendan Steele, Gary Woodland 69 - Charles Howell, Lucas Glover, Jon Rahm (ESP) 70 - Luke List, Mark Hubbard, Ryan Moore, Max Homa, Jordan Spieth, Patrick Cantlay, Patrick Rodgers, Jimmy Walker, Rory McIlroy (NIR), Harris English 71 - An-Byeong Hun (KOR), Scottie Scheffler, Patrick Reed, Vijay Singh (FIJ), Paul Casey (ENG), Tiger Woods, Chez Reavie afp