I wouldn't say wasted even if he was just a back-up.McVay is a smart guy, I think we all agree, so why would he draft a backup QB in the 4th round? Teams that have a legit QB, usually get their back ups in 6th or 7th, even undrafted. Or why not keep Wolford for another season, if its all about a high draft choice next draft?
Teams that draft well, or are plain lucky can get potential starters in the forth round, so why would McVay waste a pick?
train
A good back-up is hard to find at a cheap price.
And a fourth round back-up QB is a cheap price for the Rams to pay.