"The Miami Dolphins have their reasons for sidelining cornerback Vontae Davis for Sunday's game against the Kansas City Chiefs, and they are saying publicly that it isn't because his hamstring is too injured for him to play.

Beyond that, however, Miami is keeping the full explanation private.

The strange situation has created some confusion within the locker room, while also resulting in a separate revelation (learned by NFL.com) about a confrontation between Davis and wide receiver Brandon Marshall that occurred this week."