As you have almost certainly heard by now, Matthew Stafford has requested to be traded from the Detroit Lions and the Lions are going to do what they can to make that happen.
According to Albert Breer of Sports Illustrated, the timeline of Stafford first telling the Lions that he wants out up until the Lions agreeing to it is as follows.
NFL rules permit any offseason trades from being completed or processed until the new league calendar begins in March.
What Holmes, Wood and Campbell told Stafford is that they would consider trade offers, with the likely conclusion being that Stafford would be dealt. Fwiw, I don't think there's animosity here.
Stafford's agent, Tom Condon, is in the loop, and the Lions plan to field all offers.
— Albert Breer (@AlbertBreer) January 24, 2021