What is his trade value? A solid argument can be made that he is at his highest value right now. What is his value this season? Are you holding, selling, or buying; what is he being moved for - let's look at dynasty and redraft too. I hate to put in names because I play in small leagues but I'll throw out some: Brown for J. Graham or Gronkowski; Brown for Austin or Wallace; Brown for R. Mathews?
No one knows how serious Bradshaw's injury is. If it's open ended and multi week, Brown is a low RB1/high RB2 value. So a high end WR.If Bradshaw returns next week, he's more like a mid-low RB2 value. So maybe Austin from someone that needs a RB.If you want to trade him before Bradshaw's situation becomes less murky, you need to find someone who's convinced they've read the tea leaves, and decided that Bradshaw will be a 1B, even if he makes it on to the field, if you want something better than Austin.