I'm doing a lot of this based off of PFF, because obviously I can't watch every game, but Lenon is already 34 and is currently rated as the 2nd worst ILB in the league right about Barrett Ruud of Tennessee.
How did I not realize he is 34? Honestly I am not sure how he is rated so poorly, it gets brought up on the Cardinals forum all the time, yet he makes plays every game and doesn't give up any big plays. Now, a lot of it has to do with the fact that we have a really, really solild D-Line rotation, and Daryl Washington there to pick up his slack and make the big plays. We definitely should replace him next season, or make him a rotational player, but OLB, T and WR are far far above that in importance.