Play well? That's a bit understated. Do you honestly think GB would put him #2 behind one of the greatest QBs to play the game if they didn't think he was capable of starting?.
Define "capable of starting". You mean like Scott Tolzien and Graham Harrell? How about B.J. Coleman and then Vince Young as your backup right up to the week before opening day, then grabbing Seneca Wallace off the reject pile? These examples say nothing about Hundley's capabilities, however there is a recent history of backup QB being an afterthought or wishful thinking.
People forget that QBs that excel in GB are highly touted. That in itself makes him somewhat valuable. but I doubt GB is gonna sell stock while it has potential to go public and skyrocket in value AND at the same time currently serve as valuable insurance behind Aaron.
So, which backup QBs have excelled in Green Bay and thus were "highly touted"? Well, there's Favre as the presumptive backup for 2008, LOL, who eventually yielded the Jet's 3rd. round pick. Or Rodgers (a first round pick) as Favre's backup? I don't think that's what you're talking about here.
So, who else? Matt Flynn is one. He got a nice contract from Seattle as their presumptive starter, but it turned out he couldn't play anywhere but Green Bay. Maybe it was a dead arm. Maybe it was spending more time playing ping pong than studying the playbook.
Other than Flynn, you have to go back roughly two decades, prior to the Thompson GM era, to a cluster of backup QBs who eventually saw some success:
- Hasselbeck traded in 2001
- Brooks traded in 2000
- Brunell traded in 1995
McCarthy has a history of QB development, but other than Rodgers and Flynn that's reaching back 2 decades and more: GB for one year in 1999 as QB coach, KC (Grbac, Bono) and NO (Brooks). As head coach, not QB coach or OC, attention would be divided.
People here were still talking about the vaunted McCarthy QB camp as recently as a year or two ago, even though that went out the window with the 2011 CBA.
So, what do you want from a backup QB?
First, he needs to be on a cheap deal, preferably a cheap rookie deal. Hundley qualifies.
Second, you don't want to spend a high pick for a guy who may never play. Check again.
Third, if you can get 0.500 ball out of him against on-balance average competition in holding down the fort for a few games, then you've got a winner. Is that Hundley? I would hope we don't get a chance to find out.