If the Vikings decide next spring that Tarvaris Jackson isn't ready to become the No. 1 quarterback, it wouldn't be surprising if they try again to trade for Falcons backup QB Matt Schaub, who can become an unrestricted free agent at the end of this season. Atlanta would have the right to match any offers for Schaub, 25, and the Falcons are expected to tender him a high enough offer that it would probably require first-round and third-round draft picks to trade for him.