Statistically, approximately 1/6 of NFL teams will have to rely on their backup QB at some point next season, an even smaller percentage for a lengthy stretch of the season. Unless you have a crystal ball and can 100% guarantee that we will not be part of that percentage, we should take the search for a backup QB seriously. With the roster we're sitting on, to NOT have a "backup plan" (pun intended) would be galactically unforgivable. Aliens would come down and crap on PC/JS.
Is Portis ready to ditch the training wheels and play big-boy football? Has Wallace officially forgiven Wilson for being the QB he (Wallace) believed he could be coming out of Iowa St? Do any of us remember that Thigpen couldn't beat out Tavaris Jackson for a job in Minnesota under our current OC Darrell Bevell? Can Leinart stay out of a hot tub long enough to maintain the ruse that he still considers himself a football player?
Wallace is the only one of interest to me, with the stipulation that perhaps our coaching staff would actually curtail an offense to Wallace's strengths and abilities, meaning we'd see something different than Wallace's starting opportunities in 2008 & 2009, where frankly, he was unimpressive.
Holding a clipboard and taking a knee is the best case scenario. Worst case, we're sitting on a title contending roster and get caught with our pants down when the unexpected (yet predictable) occurs.