With all of the rule changes over the years, the NFL has transformed into a ‘pass happy’ league, which makes sense. Defensive backs can’t breathe on wide receivers without getting called for illegal contact or pass interference.

However, there’s some teams who should become a run first team or if they’re already are one, they should remain that way.

Let’s take a look at five of these teams:

Seattle Seahawks – If you weren’t a believer of the NFL being a pass happy league, this past Super Bowl should’ve officially confirmed it for you. We all know about how the Seahawks elected to throw the ball instead of just simply handing the ball off to Marshawn Lynch at the 1-yard line, and thus Super Bowl XLIX was lost.

As the two-time reigning NFC champions gear up for the 2015 campaign, it’ll be in their best interests to make sure Lynch is still the focal point of their offense.

Take away their Super Bowl blunder and you’ll realize that Lynch was the primary option last season. Lynch ranked fourth in the NFL with 280 carries while rushing for 13 touchdowns, which tied DeMarco Murray for tops in the league.

Nonetheless, some are speculating that Seattle may hand the keys over to Russell Wilson. After all, Seattle just locked Wilson up to a four-year, $87.6 million deal. The only problem with that is Seattle’s less than elite receiving corps.

Seattle’s leading receiver from a year ago was Doug Baldwin and he only caught 66 passes. The addition of Jimmy Graham will definitely help, but in order for things to truly open up in the air, it all starts with feeding “Beast Mode”.

St. Louis Rams – There has been complete turnover for the Rams at quarterback. St. Louis swapped out Sam Bradford for Nick Foles. 

“He makes all the throws,” head coach Jeff Fisher said. “He’s athletic. He’s tall and can see the field, which is important because we’ve got Tavon [Austin, the 5-8 wide receiver] and sometimes he’s hard to find. I like the way Nick handles himself in the building and the huddle. He’s demanding.”

Similar to Seattle, the Rams don’t have receivers that’ll strike fear in opposing defenses. With that being said, expect for the Rams to rely on their young running back duo of Tre Mason and Todd Gurley.

When St. Louis drafted Gurley, it created shock waves around the league because Mason had a good rookie campaign, but the second year back isn’t letting it waver his confidence.

“Tre Mason’s here,” he said in the third-person. “Give me the ball, I’m ready to rock. That’s how I feel about the situation.”

Mason rushed for 765 yards on a 4.3 yards per carry average to go along with five total touchdowns. While St. Louis takes things slow with Gurley, expect for Mason to carry the load.

On the flip side, when Gurley returns to action, we should be seeing a healthy dose of both guys.

Buffalo Bills – This is one team that doesn’t need to be told to run the ball, but I will anyway.

First of all, who’s their quarterback? E.J. Manuel, Tyrod Taylor or Matt Cassel?

Rex Ryan: "Indianapolis may not know who our quarterback is until we play them [Week 1]. We may know, but they may not."

— Mike Rodak (@mikerodak) August 7, 2015

With so much uncertainty at quarterback, pounding the rock on the ground will be the Bills best friend.

“We prefer to ground and pound it, we’re going to run it 50 times if we can on you,” head coach Rex Ryan said.

Obviously, Ryan understands they won’t be able to run the ball 50 times, but you get the point.

“We’re not naive enough to think we’re going to be able to get away with that,” Ryan added. “We can spread you out and create some nightmares in coverage. If you want to stop our run by keeping all the big guys in there, then so be it, we’ll be able to hurt you in a lot of different ways outside.”

Buffalo does have weapons on the outside in Sammy Watkins and Percy Harvin, but without a reliable guy to deliver them the ball, does it really matter?

After trading for LeSean McCoy, Buffalo has a back that’s more than capable of shouldering the load. The 27-year-old back is coming off back-to-back seasons of more than 300 carries.

The question is, who will relieve McCoy so he can remain fresh?

Boobie Dixon, Fred Jackson, Bryce Brown and rookie Karlos Williams all look to be viable candidates right now. The picture will begin to look much clearer after preseason play.

Philadelphia Eagles – As you know from the last paragraph, McCoy is in Buffalo now, but the Eagles were able to replace him with last year’s leading rusher, DeMarco Murray. The former Dallas Cowboy ran for 1,845 yards on 4.7 yards per carry to go along with 13 touchdowns.

Not to take anything anyway from Murray’s incredible season, but it’s important to note that he did have the luxury of running behind the league’s top offensive line and some are saying Dallas’ o-line deserves most of the credit.

Murray addressed those sentiments. 

“It’s a little comedic to me,” Murray said. “Every successful running back usually has a couple good offensive linemen. Those guys (in Dallas) were great, I’ve got a lot of respect for those guys. This group here, they’ve got some Pro Bowlers and great players.”

Chip Kelly’s up-tempo offense is often misinterpreted as being this overly ‘pass happy’ system, which is a complete myth. As mentioned earlier, McCoy carried the ball over 300 times and that placed him second in carries, only trailing Murray (392).

Sam Bradford is the man under center now. During his time in St. Louis, the former No. 1 overall pick just wasn’t able to stay healthy in St. Louis. He did show flashes of his potential, but it wasn’t sustained.

When you consider there’s no more Jeremy Maclin in Philly, Kelly may be prone to run the ball more than usual. Other than Murray, Philly was also able to pick up Ryan Matthews, who’s battled injuries throughout his young career, but when healthy, he’s shown to be a reliable option.

When asked about the crowded backfield with him, Murry and Darren Sproles, Matthews didn’t seem too concerned. 

“Everyone has their own techniques and their own abilities,” Matthews said. “I think we’re all working well together, I think we all complement each other well, and we’re just going to keep trying to make each other better and reach for the best.”

It’ll be interesting to see what the offensive mastermind cooks up this fall.

Kansas City Chiefs – Prior to last season, Jamaal Charles finished in the top 10 in the NFL in carries for consecutive seasons. Last year, the 28-year-old back only totaled 206 carries.

Eagles fans are probably nodding their heads as they read this because Andy Reid has a reputation for completely abandoning the ground game at times.

A prime example would be after the Chiefs mid-season loss to the San Francisco 49ers. Early in the 4th quarter when Kansas City trailed by two points, on 3rd-and-1, Reid selected a pass play, which resulted in an incomplete pass and a punt to follow.

“If we had that to do over again, and this is hindsight, but I’d probably come back and hand it to him and give him an opportunity to make that play,” Reid said.

Sure, Kansas City has a legit receiving threat in Jeremy Maclin this time around, but their quarterback is still Alex Smith. Now, Smith isn’t terrible by any stretch of the imagination, but he’s not a guy you entirely trust with the ball in his hands during crunch time.

I mean, after all, how could you not want to give Charles the ball more after his recent remarks?

“As long as I play in this league and I play on a high level, I’ll always feel like a team is going to have to stop me,” Charles said confidently. “I feel like sometimes, I’m the LeBron of football, especially at my position, because I can do so much.”

While most teams are spreading defenses out and throwing the ball all over the lot, these five teams may want to stick to opening up passing opportunities through their run game.