Draft: Which teams use a 3-4 scheme?

[AzPatsFan]

Update:

Based on the thread response so far, here's where we're at:

The initial six 3-4 teams...

NE
Cleveland
Pitt
SD
Dallas
Baltimore

...while these 4 remain uncertainties:

Pitt (may change to a 4-3)
Dallas (may change to a 4-3 now that Parcells is gone)
Baltimore (no longer uses the 3-4 as their base D)
SF (will be changing to a 3-4)

Leaving only 3 teams for certain who use a 3-4...

NE
Cleveland
SD

Once we have an accurate list, we can start looking at which teams need LBs...

Any thoughts?

houston USED to play the 3-4 . Tthey have left over 3-4 players that don't fit their new 4-3. Opportunity !!!