With the deadline for signing restricted free agents to offer sheets less than a week away, only three such players have changed teams this year.

The Lions obtained defensive back Kalvin Pearson from the Bucs, the Bengals finagled tight end Ben Utecht from the Colts, and the Titans acquired kick returner Chris Carr from the Raiders.

In each case, the player had been undrafted and was tendered at the lowest level.  As a result, there was no draft-pick compensation.

Meanwhile, 31 restricted free agents signed their one-year tender offers, putting them under contract for one more year, and eligible for unrestricted free agency in 2009.

We’re not sure why so few restricted free agents have changed teams this year.  It’s possible that teams have opted to steer clear of restricted free agents, given that any offer sheet that doesn’t include a poison pill possibly is evidence of collusion among the teams.  The poison pill remains a viable device for promoting player movement; a year ago, the union didn’t object when teams failed to use it in offer sheets. 

It’s a different climate now, and it very well could be that there’s a wink-nod arrangement among the teams that offer sheets will be pursued only as to those players for whom there is no draft-pick compensation.

Of course, that would be collusion, too.  If that’s what has been happening.