The Pittsburgh Steelers and head coach Mike Tomlin have agreed on a contract extension. In other news, the sky is blue. 

The news of Tomlin's extension comes from NFL.com's Albert Breer:

This doesn't come as much of a surprise.

After serving as a defensive coach under several other NFL teams, the Pittsburgh Steelers brought Tomlin in as the head coach in 2007. 

It was a huge opportunity for Tomlin, but he had some huge shoes to fill. He was replacing Bill Cowher, who, in 14 seasons as the head coach for the Steelers, racked up a 240-149 record, two NFL Coach of the Year awards, two AFC Championships and one Super Bowl victory.

Tomlin is starting to outgrow those humongous shoes.

In five seasons with the Steelers, Tomlin has led his team to a 55-25 record, only once failing to reach 10 wins and the playoffs, which came in 2009, when he went 9-7.

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Yes, his worst season is 9-7. 

But in a third of the time as Cowher, Tomlin has racked up close to the same amount of accomplishments. 

In 2008, the year he led Pittsburgh to a Super Bowl victory, he was named the Motorola NFL Coach of the Year. He also led them to the Super Bowl once again in 2010, although they lost to the Green Bay Packers. 

Even as fortunate as Tomlin was to take the reins of a Pittsburgh team already with loads of talent, it's not often you see a first-time head coach put up a .688 win percentage (55-25) in his first five years. 

Tomlin is still just 40 years old, but he is well on his way to entering the elite tier of NFL coaches.

This extension was about as close to a "no-brainer" as they come, and it should only help Tomlin focus on continuing his dominance in the AFC North.