The coming days are among the longest on the calendar for NFL front offices. They’re not only finalizing their own 53-man rosters but projecting what’s going to happen around the league. They have seen film on anybody who might get cut, waived or dangled via trade between now and Tuesday’s cutdown deadline. “I’ve been in it myself a number of times, formally as a player,” Broncos head coach Sean Payton said Sunday after polishing off a 3-0 preseason with a 38-12 drubbing of Arizona.