The arrival of Ed Reed looks like it will have a dramatic effect on second-year safety Antonio Allen — and not all in good ways. Allen played just three snaps last week for the Jets against the Bills after starting for most of the season. You have to wonder how it will stunt his development. “It kind of hit me by surprise, but I’m not really focused on that,” Allen said of his playing time in Buffalo. “I’m trying to focus on the things that I can control, and that’s when I’m out there on the field, for however many plays, I just have to give my all and continue to play.” Allen started seven of the Jets’ first nine games and was a key player in several of them. He returned an interception for a touchdown against the Patriots, and the play proved to be a huge momentum swing in the Jets’ win. Coach Rex Ryan said Allen remains a part of the defensive game plan, but the Bills’ matchups caused him to stay away from some of the packages that include Allen. Defensive coordinator Dennis Thurman expects to see more Allen this week.