GAINESVILLE — Embattled coach Billy Napier turned to the future to try to secure his own at Florida. Led by a pair of first-year players who are each just 19, quarterback DJ Lagway and tailback Jadan Baugh, the Gators ended a three-game losing streak to Kentucky with a convincing 48-20 win Saturday night in the Swamp. “They stepped up in a major way,” Napier said. Lagway, who replaced injured veteran Graham Mertz, and Baugh, starting in place of senior Montrell Johnson Jr., became the first true freshman quarterback and running back to start in the same game.