In the past, the Seattle D has made some backup QB's look like all-stars. Thankfully, those were your father's Seahawks and the Ken Behring Seahawks. (Gary Kubiak, anyone? plus many other backups whose names escape me, suppressed memories of horrible games)
The worst cases in the Carroll 2012+ era seems to be the Rams backup QB Austin Davis in 2014, along with Tre Mason running wild, in a 28-26 Rams win. Then there was the goal-line stand game against the Rams in 2013 that was a win, barely, with Kellen Clemens as the Rams QB. By far the worst "backup QB fail" in the Carroll era would have been Mike Glennon in the 2013 game vs. Tampa Bay that Tampa led 21-0. However, can't count it because Glennon was the TB starter by that point, beating out a benched Josh Freeman, and Seattle went on to win that game in OT.
Clausen looks to be truly up against it in this game. You, sir, are no Austin Davis, nor Mike Glennon, not even a Kellen Clemens, and your defense is no StL Rams defense.