Lions resigned andre fluellen. I guess he's back as essentially a 5th DT (or a 4th if sammie lee hill is not back.)
Lacey has been added for secondary depth, and presumably at a good price because there's not terribly much cap room available. He started last year for the awful Colts, so presumably that would mean he'll start for us, or at least be in the mix with Aaron Berry, Alphonso Smith, Amari Spievey, etc.
No details on the $$ at this point, but I would think that the deal isn't for very much, and so Lacey's probably just about as good of a player as we can get for the money.