According to Lions beat writer, Tom Kowalski (who is one of the most plugged-in beat writers in the country), Lions defensive coordinator Gunther Cunningham is interested in trading for Chiefs defensive end Glenn Dorsey.  Which isn't really a surprise, except that Kowalski is also hearing that Dorsey may be on the trade block.  Per Kowalski's report:

The reason he might be available is because the Chiefs drafted Dorsey as a 4-3 defensive tackle and they've now switched schemes and he's playing a 3-4 end. Neither the Chiefs nor Dorsey is apparently happy with the results and that's why I think the Lions might make a play for him in the off-season.

So could the time of Glenn Dorsey be coming to an end in Kansas City?  The current regime has made no secret of their willingness to deal players brought in by the previous regime and while Dorsey performed decently, in my opinion, as a 3-4 end he wasn't exactly reminding anyone of Reggie White.  A move back to defensive tackle in a 4-3 alignment, his natural position, has to be very tempting for Dorsey and if the team's less than happy with Dorsey's performance at defensive end they probably aren't thrilled with the idea of continuing to carry his contract.

Worth keeping an eye on this offseason.