According to Master Tesfatsion of Bleacher Report, the Raiders were shopping Derek Carr in a trade at the NFL scouting combine.
It could have been casual, it could have been serious, you never know especially with the Raiders.
There have been rumors for months that Derek Carr isn’t a Gruden guy, but unless someone offered them a lot, I doubt a trade will happen.
The time between the Combine and Draft you are going to hear a lot of rumors, so just be prepared.