Many of us have suggested Bengals Free Agent NT Pat Sims (6-2, 325), a big NT with some pass rush ability, but maybe he's just not that good?
www.walterfootball.com/freeagents2012DT.php
WalterFootball.com has just posted their complete position rankings for all 2012 Free Agents, and Pat Sims is only rated as the 33rd best Free Agent DT, receiving a grade of 1 1/2 stars (out of a maximum of 5 stars). Here are some of the other Free Agent DT's they rank who may be of interest to Panthers fans.
Ranking - Grade - Position - Name - Age (as of Sept 1st) - Current Team - Additional Info
2. - 4 Stars - NT - Paul Soliai - Dolphins - 28 - 2011 Franchise Tag salary $12.3 million.
8. - 3 Stars - NT - Sammie Lee Hill - 25 - Lions - A RFA (Restricted Free Agent).
10. - 2 1/2 Stars - DT - Derek Landri - 28 - Eagles - A good inside pass rusher, a Panther in 2010, not re-signed.
11. - 2 1/2 Stars - NT Antonio Garay - 32 - Chargers - "No longer the player he once was".
13. - 2 Stars - DT Amobi Okoye - 25 - Bears - 4 sacks in 2012.
33. - 1 1/2 Stars - NT - Pat Sims - 26 - Bengals.
It's a long list, 48 Free Agent DT's, with ex-Panther Nick Hayden ranked last. They have a brief write up about each player, and if you follow the link you checkout their other position rankings as well (Dan Connor is their 4th best ILB I believe).