Brad Cottam was waived/injured on Wednesday by the Chiefs after reportedly failing a physical.
The waived/injured designation means that Cottam was sent through the waiver wire process and, now that he's gone unclaimed, returns to the Chiefs.
The Chiefs officially placed him on the reserve/PUP list on Thursday.
He can not participate for at least the first six weeks of the season though it's unlikely he'll play in 2010 at all.
The reason for doing this move is that he doesn't count against the roster so the Chiefs can get a replacement for him, which they did with tight end Leroy Banks.
So, in the end, the Chiefs retain Cottam's rights.