By JOE STIGLICH
SAN FRANCISCO (AP) — Blake Snell allowed four hits over six shutout innings and Trent Grisham hit a two-run homer to lead the San Diego Padres to a 4-3 victory over the San Francisco Giants. Snell struck out eight and rebounded from a shaky start against Cleveland his last time out, when he permitted a season-high six runs. In three starts against San Francisco this season, the left-hander has held the Giants to two runs and struck out 27 over 17 2/3 innings. The Padres extended their lead for the National League’s third wild card to three games over Milwaukee, and they pulled within a half-game of Philadelphia for the second spot.