Go the Free Agent screen in Franchise mode. Sign a free agent named Jordan Beck. He is a middle linebacker that is 71 overall. Change his position to defensive end, and he will be 90 overall. The same thing works for many other linebackers when changed to defensive end. You can also change Ladainian Tomlinson's position to linebacker. Do this, then trade for him. He will have an F trade rating, and his team will accept almost any player in a trade. Once signed, release him, then resign him to save cap room. Then, change his position back to running back. He will be 99 again. This can be done for lots of other players.