The Buffalo Bills began OTAs Tuesday, and according to reports, every player was in attendance except one — James Cook. The star running back awaits a contract extension, and while OTAs are voluntary, he may be taking his negotiating tactics to the next level.

Buffalo Bills running back James Cook is sitting out voluntary organized team activities as part of an initial holdout with

As Rapoport noted, Cook has until mandatory minicamp (which begins on June 10) to determine whether he's willing to actually hold out for a new contract. OTAs are optional, so he can't be fined for failing to show up.