PHILADELPHIA—Dak Prescott ran into Dallas’ locker room with a message for any NFC team he’ll play next week in the playoffs. “The real (stuff) starts,” he said. It starts with finding out the Cowboys’ wild-card opponent, and Prescott will be like millions of football fans every Sunday and watch the scoreboard with their playoff fate at stake. Prescott threw a career-high five touchdown passes against Philadelphia Eagles backups, Cedrick Wilson and Dalton Schultz each had two scoring catches and the Cowboys kept their slim hopes for a No. 2 seed in the NFC playoffs alive with a 51–26 victory Saturday night. The Cowboys still had seeding to play for against an Eagles team that rested Jalen Hurts and other key starters ahead of an NFC wild-card game next week. The NFC East champion Cowboys (12–5) need losses Sunday by reigning Super Bowl champion Tampa Bay against last-place Carolina and also …