The Kansas City Chiefs' offense has already accomplished something that's only ever been done one other time in NFL history, and they did it before they even played the last game of the regular season.

After Sunday's 29-13 win over the Dolphins, the Chiefs now have a 4,000-yard quarterback in Alex Smith, a 1,000-yard tight end in Travis Kelce, a 1,000-yard receiver in Tyreek Hill, and a 1,000-yard running back in Kareem Hunt.

The 1981 San Diego Chargers are the only other team to ever accomplish that feat, which makes this Chiefs' group—according to these numbers—one of the best and most-balanced offenses in NFL history.

"It means we have a lot of different weapons and that we can beat you a lot of different ways," Hunt explained after Sunday's game of this accomplishment. "Honestly, we've just got some playmakers on this team. We just got to keep riding together and keep it rolling."

"That's just hats off to all the hard work we've put in and the talent the Chiefs have brought in here," Kelce said. "It's a cool feat, but it doesn't mean anything if you don't have a ring at the end of the year—that's for sure."

"It just means anybody is capable at any time—whether it's Kareem, Kelce, or myself, Albert [Wilson] or D-Rob—all of us are capable," Hill added. "Alex has been trusting us a lot down the field and that gives us confidence as receivers and make the play for him, so just have to keep at it."

Headed into Sunday's game, Kelce needed just nine yards to hit 1,000 for the season, while Smith needed 262 yards passing to hit 4,000.

Kelce finished with four catches for 47 yards and a touchdown, while Smith finished 25 of 39 for 304 yards and a touchdown.

"I think the thing I'm more pumped about is the whole offense all together," Smith noted after the game. "To have a 1,000-yard rusher, two 1,000 yard receivers then to hit 4,000 yards passing as a quarterback – to have all that going on at once I think is the most special part of everybody involved.

"I think taking pride in that as an offensive unit, that we got a 'can't stop us all' mentality."

Over the past four games, the Chiefs' offense has been hard to stop, or even slow down—averaging 6.6 yards per play. It's a main reason the team has rattled off three-straight wins and find themselves as the AFC West champions for the second year in a row.

Chiefs' coach Andy Reid—Santa suit and all—spoke after the game of Smith and offenses' performance this year.

"It's phenomenal," he said. "What a great year offensively. We're not done yet though. We're not going to sit on this. We're going to move on. We're going to enjoy the holiday and then we'll get right back at it."