This might be a surprise for people outside of Kansas City but not for Chiefs fans. Glenn Dorsey, the Chiefs fifth overall pick in the 2008 NFL Draft, seems unlikely to return to Kansas City following the 2012 season.
Adam Teicher of the Kansas City Star does a good job rehashing some of the reasons this may be it for Dorsey. A few reasons I might add:
He's in a contract year. Dorsey's deal is up at the end of the season. The Chiefs would have to sign him to a new deal or slap the franchise tag on him in order to keep him. The franchise tag seemed like a possibility before this year but now it doesn't.
He's been hurt this year. Dorsey missed four games earlier this year and left the Chargers game with the same calf injury that kept him out before. Romeo Crennel indicated Dorsey's injury could be serious.
The Chiefs defense isn't noticeably worse without him. The problem is that you can't see much of a difference in the Chiefs defense whether Dorsey is in there or not. That's not a good sign for him.
The Chiefs have a cheaper option. Ropati Pitoitua and Allen Bailey are both on the roster.
It's not that Dorsey is a bad player -- he's not -- but that he's probably more valuable elsewhere.