A common thread through the first four games of the season has been the dominance of the Oklahoma Sooners' offensive line. Time and time again, opposing coaches give praise to the explosiveness off the ball as well as the sheer size of each individual along the line.

Trevor Knight mentioned the strength displayed against the Tennessee Volunteers.

"Our offensive line did a great job of mashing [Tennessee] off the ball at the beginning of the game and just opening things up for [Keith Ford]."

West Virginia Mountaineers Head Coach, Dana Holgorsen followed that up the following week with a similar compliment.

"The offensive line did a phenomenal job getting off the ball," Holgorsen said. "They were getting to the linebackers and knocking them 5 yards past linebacker depth."

There is no denying the offensive line is experienced and well coached. Part of their success can be attributed to the sheer size of each individual. But, exactly where do they stack up when it comes to size? In order to adequately compare this Oklahoma offensive line to another squad, we need to jump into the NFL.

The OU offensive line compared to the biggest in the NFL pic.twitter.com/EvIaCeDVYO — Forrest Scott (@foscott) September 24, 2014

At an average of 325.8 pounds per lineman, the Sooners rank second amongst NFL teams when it comes to the biggest lines. It's no wonder OU holds an advantage over opposing defensive fronts while consistently opening up running lanes for the running backs.

The size came into play last Saturday as Samaje Perine rushed for 242 yards becoming the first freshman at Oklahoma to rush for over 200 yards in a single game since Adrian Peterson. That's some pretty lofty company. As a sign of gratitude, Perine walked into the O-Line's film session carrying several pizzas according to NewsOK.

"We were watching film, and he just walked in right over there and set the boxes of pizza down and walked out," said junior center Ty Darlington. "That's who he is. He's just been so grateful to us, even though he did a lot of it himself. He's a humble dude, and that's refreshing."

Could they soon overtake the Oakland Raiders?