Really fun thread topic. Kudos.
So my thinking is along these lines. You need to have a major impact player, obviously. The Pats have needs in numerous areas, so which one is the biggest need and for which there is a player available to fill that need?
Initially my first thought was that the interior OL has been a mess all season long, so I thought of Hannah. But then I remembered that, even though he hasn't been at his best this year, they do have Mankins at the LG spot that Hannah plays. So the upgrade there, while real, isn't as big as it could be elsewhere. So Hannah is out.
As much as I like Troy Brown and Stanley Morgan, and even though Thompkins and Dobson are out, I think the WR corps is ok with Amendola and Edelman playing well. Don't get me wrong, adding Stanley Morgan would be awesome, but I think there's another spot more important.
What about LT? With Vollmer out and Solder dealing with concussions, Bruce Armstrong would be a great fit. Definitely a possibility. Keep him on the short list.
Defensively, they are getting roasted in the passing game again, by the likes of Tannehill and Jason Campbell. Why, though? Is it a coverage issue? Imagine having Mike Haynes and Talib manning the corners. Wow, that would be sweet. So that's a possibility.
I'd like to upgrade our LB situation, because Hightower is really struggling. Putting Bruschi, a natural playmaker, in there, or even a Steve Nelson, would be a major upgrade. In this defense, I'd prefer Bruschi.
But the pass rush could use some help too. Andre Tippett, also a LB, was one of the best pass rushers in AFC history. Him and Jones crashing down from the ends would be sweet.
And the last piece would be tight end, where they're decimated. Ben Coates would be an amazing fit there. In his prime, he was an absolute beast. Gronk before Gronk. Very good speed, great hands, an absolute load. 6'5", 245 pounds, he could run block and catch with the best of them. He'd upgrade this offense immensely.
So my short list is these five guys, and adding any of them would help this team out a lot.
LT Armstrong
CB Haynes
LB Bruschi
LB Tippett
TE Coates
If Solder is ok, then I'll pass on Armstrong. If Solder is not ok, then I think Armstrong may be what the offense needs. I'll assume Solder can finish out the season. Cross Armstrong off.
In terms of defense, I think I'd rather have Tippett than Bruschi. Spikes in the middle, put Tippett outside, opposite Jones, and let him wreak havoc. Of course, in order to maximize him, Patricia would have to blitz, and he doesn't seem to really want to do that, so the biggest part of Tippett's game is wasted. So no to the LBs.
That leaves Haynes vs. Coates. Haynes and Talib would be an amazing cover duo, and I'm very tempted to go that way. The Pats could blitz more knowing they had the corners locked down. But TE is a glaring weakness right now and Coates would fill the need so well.
But I think they can still find ways to score, and even though the Pats have both Talib and Dennard, I think Haynes helps NE more than Coates does. Dennard can then play a slot and the opponents' three top WR options are all blanketed pretty well.
So long story short: Mike Haynes.