How do you let your QB situation get this bad?

I've tried watching these two teams today. It's really amazing how bad their QB situations are. Sad, because there are weapons everywhere else on the field, both offensively and defensively. They could actually be halfway-decent teams, but their signal-callers aren't even close to being NFL-level.

In this day and age, how do you get caught without a quarterback? I don't get it.