NFL Week 4 - When Dak Prescott fractured his thumb in the fourth quarter in the season-opener, it was clear and obvious that the Dallas Cowboys were DOOOOOMed. The Cowboys offense already looked remedial against the Buccaneers, with an offensive line seemingly unable to pass protect; Prescott was pressured on 35.5% of his dropbacks. Now you're sticking a backup quarterback in there? Write the season off after Week 1; Cooper Rush isn't going to save anybody.
From an objective standpoint, the Cowboys had the worst backup quarterback situation to start the season—they didn't technically have one.