It's actually a pretty small price to pay for a nose tackle who figures to start.
From Dallas' standpoint, Ferguson became expendable after he tore his biceps in the 2007 season opener and replacement Jay Ratliff played so well that he was signed to an extension.
Maybe the only issue with Ferguson is the fact he's already 33 years old, but that's still four years younger than Traylor was last year.
Ferguson's acquisition is a clear sign the Dolphins will use a pure 3-4 defense next season, and that should eliminate the possibility of Miami drafting either Glenn Dorsey or Sedrick Ellis at No. 1 overall because both are 4-3 defensive tackles.
KIRCUS COMING: In a signing made before the start of the free agency period, the Dolphins picked up three-year veteran David Kircus, a wide receiver from Grand Valley State.
Kircus has ability, but he made news last year for being charged with assault for allegedly punching a man at a party.
LEMON SIGNS: Quarterback Cleo Lemon didn't need much time to find a new team, as reports indicate he has signed a three-year deal with the Jacksonville Jaguars.
It seemed pretty much a given from the end of last season that Lemon, who will back up David Garrard with the Jaguars, would be moving on.