Winston and John Brown for Joe Flacco and my 2nd and 3rd?

Dynasty League:

Have an offer to give up my 2nd round pick for Jameis Winston.
My other QB’s are: Stafford, Carr, Rosen, Flacco.

Not sure how many years I’ll get out of Flacco and Stafford. Rosen and Carr aren’t reliable…

6 point td’s. Would I be giving up too much?