Leading first-round scores on Thursday in the US PGA Tour Puerto Rico Open in Rio Grande (USA unless noted, par-72): 65 - Tommy Gainey 66 - Robert Garrigus, Rafael Campos (PUR), Taylor Pendrith (CAN), Lee Hodges, Greg Chalmers (AUS), Fabian Gómez (ARG), Brandon Wu 67 - Brice Garnett, Josh Teater, Branden Grace (RSA), Cameron Percy (AUS), Andrew Putnam, Mark Anderson, Dalton Ward afp