Mark Sanchez and the NFL's 5 Biggest Coach-Killers

"Coach Killer" is perhaps the worst label that can be placed on an NFL quarterback. It combines the seductive allure of talent with the devastating lack of production when it matters most. Some quarterbacks are just good enough on paper to convince a team to make them their starter, yet fall short enough of the mark on the field to lose games and get coaches fired.

Click through the slideshow to see the five biggest coach killers in the NFL today. Some are well-established coach killers, while others are still working on their first victim.

Mark Sanchez

The Sanchize. Despite Rex Ryan's staunch support, Sanchez is regressing this season. While he can be good at times, he has been utterly terrible in almost all of the Jets losses this season. That is the classic m.o. of a coach killer.  

With the Jets defense also in decline this year, Rex Ryan's position on the sidelines could begin to get a little less certain. Sanchez still has quite a bit of work though before he takes out Ryan, primarily due to the goodwill he has stored up with back-to-back AFC Championship appearances.

Vince Young

Vince Young earned his way into the Coach Killer Hall of Fame with his elimination of Jeff Fisher, the longest tenured head coach in the league at the time. Young has exceptional talent, but never showed the heart or the brain to be a legitimate NFL quarterback in Tennessee.  

Now he has moved onto his next target: longtime Philadelphia coach Andy Reid.

Michael Vick

Woe is Andy Reid. After weathering the Terrell Owens storm and getting rid of Donovan McNabb before it was too late, he now has two of the most accomplished coach assassins in the NFL today. Vick is a veteran at this game, having burned through four head coaches in Atlanta.

I pity you, Andy Reid. I really do.

Tony Romo

Tony Romo is another tailor-made coach killer. He has his owner's undying support, yet consistently find creative ways to lose football games. When he is on his A game, he is one of the best quarterbacks in the NFL. But when things go badly, they go really, really badly. One can only wonder how long Romo can continue to be the QB in Dallas without any meaningful playoff success.

Matt Cassel

The Kansas City Chiefs were sold a false bill of goods when they picked up Matt Cassel. After looking like a decent option standing in for Tom Brady in New England, Cassel gave them one good season before promptly falling off the globe when Charlie Weis left to return to the NCAA.  

Todd Haley's days may be numbered for several reasons, and Matt Cassel is chief among them.