​The ​Kansas City Chiefs hybrid college/pro-style offense has been unstoppable this year. They feature four players who are ​first-team All Pro and have only been held under 30 points four times this season.

Quarterback Patrick Mahomes has posted historic numbers, throwing for over 5,000 yards and 50 touchdowns as a first-year starter, tossing to weapons like the speedy Tyreek Hill, tight end Travis Kelce, and Sammy Watkins.

So, with all this firepower, you have to wonder...

Who the hell is the Chiefs' backup QB?

Enter Chad Henne.

A second-round pick of the Dolphins in the 2008 draft, Henne was once upon a time considered to be Miami's version of Tom Brady.

I'm not kidding.

After taking over for an injured Chad Pennington, Henne led the 0-3 Dolphins to a somewhat respectable 7-9 record.

Henne would go on to Jacksonville, and is actually in the team's record book. 

In 2012, he came off the bench in a Week 11 game against the Houston Texans and threw for over 300 yards and four touchdowns, joining Hall of Famer Steve Young as the only players not to start a game to throw for four touchdowns without an interception.

A year later, Henne started 13 games for the Jags and would go on to become the first Jaguars quarterback since David Garrard to have over 3,000 yards passing in a season.

Henne has mostly been invisible since then, but has now settled nicely into the role of veteran backup for Andy Reid's Chiefs. So now you know! If tragedy were to strike KC, the Chiefs are in fairly capable hands.