Michael Conforto homered against the team that drafted him in the first round a decade ago, helping to back rookie Keaton Winn’s latest stellar outing as the San Francisco Giants beat the New York Mets 5-2. Nick Ahmed hit a two-run single in the second and Matt Chapman added a two-run double the next inning to support Winn. He struck out six while allowing four hits and one walk in six-plus innings. Pete Alonso homered leading off the fifth for New York — its first run in two days following a 10-0 loss to the Dodgers on Sunday.