Top-ranked Scottie Scheffler and third-ranked Rory McIlroy combined to give the PGA Tour a 2.5-0.5 victory over LIV Golf’s Brooks Koepka and Bryson DeChambeau in Tuesday’s Showdown match-play exhibition.The Showdown joined the majors as one of the few places where top players from the rival tours tested each other since the start of LIV, whose Saudi Arabian Public Investment Fund backers remain in talks with the PGA about reuniting.