Leading scores from Thursday's darkness-halted first round of the US PGA Houston Open (par-70, USA unless noted, round to finish Friday morning): 65 - Brandt Snedeker 67 - Cameron Davis (AUS), Michael Thompson, Scottie Scheffler, Harold Varner, Carlos Ortiz (MEX), Jason Day (AUS) 68 - Adam Long, Kevin Streelman, Sam Burns, Talor Gooch, Sepp Straka (AUT), Scott Piercy, Adam Scott (AUS), Greg Chalmers (AUS) 69 - Matt Jones (AUS), Russell Henley, Denny McCarthy, Shane Lowry (IRL), Tony Finau, Corey Conners (CAN), Patton Kizzire, Pat Perez, Mark Hubbard, Graeme McDowell (NIR), Russell Knox (SCO), Scott Brown WD - Rory Sabbatini (SVK) 75 afp