http://www.packersnews.com/story/spo...lynn/14483513/

Pete Dougherty doesn't think so much of Tolzien or Flynn, so the Packers should only keep one. He gives the example of the Patriots with better backups, Ryan Mallett and Jimmy Garoppolo, who might be wise to keep three and get some trade value out one of the backups down the road.

Jaguars traded Blaine Gabbert to 49ers for 6th last spring
Raiders got a 7th for Terrelle Pryor from Seattle

There are a lot of trades for unheralded backups, but I can't remember anything during fall season.