JACKSONVILLE, Fla.—Jacksonville linebacker Josh Allen wanted his namesake’s jersey—badly. He figured the white, No. 17 top with blue numbers and red trim worn by Buffalo quarterback Josh Allen would look good on a wall somewhere in his home, especially if it still has all those grass stains. “I’m gonna get it, though,” Allen said confidently. It could end up being a collectable, at least for the Jaguars. Jacksonville had the better Allen on this Sunday, with the third-year pro intercepting a pass, making a sack and recovering a fumble in a 9–6 upset of the Bills that will go down as one of the best defensive efforts in franchise history. Allen and fellow pass rushers Dawuane Smoot and Taven Bryan harassed Buffalo’s Allen all day and caused three second-half turnovers that propelled Jacksonville (2–6) to its second victory in three games. “That’s what we’re supposed to do,” Jacksonville’s Allen said. …