All three of these players if healthy and 90% + can help this team.
Sean Lee must be as close to 100% as it gets because at this point what we have put out there at LB without him has been outstanding. A rested Lee in shape is a great thing to have and this is the time of year you need depth to rotate as any. Be nice to see some packages with Lee, LVE and Jaylon out there at the same time.
Tavon Austin is the 1 player before Amari Cooper arrived to be in connection with Dak Prescott deep and I think that is 1 element where Tavon will help because teams are now going to be doing everything to stop Amari Cooper and Dak from connecting. Obviously Michael Gallup is showing signs but Dak and Gallup are still not as n sync as they need to be deep to take some attention off of Amari Cooper. Furthermore, Austin can help in the slot, gadget plays and on reverses when we see the defenses wheels are starting to fall off and we need safe yardage to keep the clock off. He's a threat to bust out all the way at anytime once there's space. Let's not forget returns where we have had basically no spark. Austin could do nothing but help in that department as well.
David Irving who has not been practicing I have no idea how he is probable but boy oh boy if he is in shape and his head is in playing then we have someone up the middle that is just going to hurt the QB in 2 ways, especially with both our outside rushers imposing on the opposition. 1. Irving gets at the QB and crashes the pocket from the interior. 2. His height and reach knocks down balls right up the middle where Qb's want to step into the pocket. The throwing lanes just not are the same for the QB when David Irving is out there. Another piece that would add to a fine rotation of Maliek Collins, Tyrone Crawford, David Irving and Antwuan Woods. This would definitely complete what would be the best front 7 in the NFL. Let's hope Big Irv is into this playoff run.
Save for the safety position, the overall depth on this defense if Lee and Irving come back is unparalleled in this league especially at this time of year.