I'd say out of those 3 Mathis is the most realistic. Indy is clearly in rebuilding mode evident by the fact they've fired their GM and head coach. At this point wouldn't be shocked if Manning was let go as well. Mathis didn't have a great year, but a solid one. 9.5 sacks and 3 forced fumbles. You also have to take an account he was on the worst team in football so motivation was an issue. In Dallas playing for a team that was very close to making the postseason I firmly believe the motivation would be there for Mathis.