21. Bad Interception
The Dallas Cowboys have had some poor quarterbacks down through the ages. However, one fan was emphatic about who their worst historic signal-caller ever was. “It’s got to be Brandon Weeden,” he said. “But the worst actual play by a QB I’ve seen on my team was when Cassel threw an interception and getting called for intentional grounding on the same play.”

This shambolic play came in 2015 against the New York Jets. Matt Cassel threw the ball straight into the hands of the Jets’ Darrelle Revis. No receiver was nearby so this prompted an intentional grounding call in an unusual and unflattering situation. Unfortunately, every quarterback is capable of making a ridiculous error but this is one that Cassel struggled to shake off.