Some quarterbacks might receive fully guaranteed contracts in the future but I highly doubt most deals will be done that way.
There already is one...Kirk Cousins...3 years/$84 mil/fully guaranteed. It's kind of an expression that the Vikings think he's good enought to win with an outstanding defense, but not exactly good enough to lock down as the face of the franchise. Overpriced rent-an-arm; a hired mercenary; let's nickname him Blackwater. That is a pretty unique team perspective on the matter and it requires a lot of available cap space for a high pay-as-you go approach.
Some quarterbacks might receive fully guaranteed contracts in the future but I highly doubt most deals will be done that way. Both Foles and Daniel are backup quarterbacks and not the face of their franchise though.
These guys were discussed in a piece that was semi-linked a few posts above:
https://www.cbssports.com/nfl/news/...rs-deal-lets-examine-the-nfls-opt-out-clause/
"Daniel can opt out of the second year (2019) of the two-year, $10 million contract he signed with the
Bears in March by repaying $5 million during a 10-day window in February, right after Super Bowl LIII."
Repaying $5 mil out of $10? LOL I don't think this is what we're talking about. The only way he exercises that opt out is if he has to take over for Trubisky
and pulls a Keenum whereby somebody wants to pay him as a starter. I don't think the Bears are worried.
"Foles' renegotiated contract with the
Eagles is more complicated than Daniel's. The Eagles have an option to pick up Foles' 2019 through 2021 contract years containing healthy salaries for a starting quarterback by the middle of next February. If the option is exercised, which isn't the intention, the Super Bowl LII MVP can void the years with a $2 million payment to the Eagles."
This is a very unique situation. Start with a franchise QB working on a relatively cheap rookie deal leaving cap avaialble to allocate to the backup position. They know that as with last season they have the roster to win. Said franchise QB is coming off injury and they've shown they can win with Foles in a pinch. This contract is designed to be a one year insurance policy in "win now" mode if Wentz has issues. Nobody was interested in paying up for Foles after the playoff run. At this point he's viewed as a run-pass option system QB, an offense few know how to run or want to learn how to run. Worst case, Wentz dies in a car crash, they exercise Foles for lack of other options, he still makes more money than anybody else will pay him minus $2 mil, and he thereby does not exercise.
In summary, the two cases have in common backup QBs who are also employed as insurance policies against pre-existing risks with the starter, in once case for a potential first round bust, in the other for a franchise QB coming off injury.