Like any sport, mixed martial arts is filled to the top with a variety of different personalities that have helped transform the sport into the powerhouse it is today.
With a variety of different personalities come those who get the job done without ever having to speak a word about it.
But, as we know, that type of personality comes few and far between, as MMA is filled with fighters who love to ramble on.
However, it's gotten to the point where in order for these fighters to continues their talks, they'll have to start backing it up.
So, the following slides display the 15 fighters who need to put up or shut up.
The Huntington Beach Bad Boy insists that he has another fight left in the tank before he finally calls it quits to an historical career.
Ortiz has been awful as of late, winning just one fight in his last eight appearances.
Meanwhile, Ortiz continues to believe he can compete in the light heavyweight division.
Well, it's time for him to prove it.
We're all more than familiar with the bromance gone bad between Rashad Evans and current 205-pound champion, Jon Jones.
However, that isn't where things stop as Evans has entered the Octagon on more than one occasion following a Jones victory.
It's time Evans backs it up.
Sure, Quinton "Rampage" Jackson can still compete in the light heavyweight division but he's not near the fighter he once was.
If you really begin to examine Jackson's track record you'll find a controversial split-decision victory over Lyoto Machida.
But, other than that, Jackson hasn't defeated a legitimate contender since Dan Henderson at UFC 75.
Dan Hardy has been and always will be a fan favorite.
Even still, that doesn't mean Hardy gets a hall pass, as he's been nothing to shake a stick at, losing four consecutive fights.
At some point the talking will have to fade and results will have to be produced.
Jason "Mayhem" Miller did a whole lot of talking leading up to his bout with Michael Bisping at The Ultimate Fighter Season 14 Finale.
Unfortunately for Miller, he came up short in a knockout defeat.
That doesn't necessarily mean the trash talking ends but it does mean Miller will have to prove he's more than capable of competing in the middleweight division.
Didn't Michael Bisping just defeat his arch nemesis Jason "Mayhem" Miller?
Of course he did.
All it has meant is the trash talking has shifted from Miller to Demian Maia.
Bisping will need to continue to back up all the arrogance as he's still yet to defeat an actual title contender.
A list like this wouldn't be complete without the beloved Nick Diaz.
In all seriousness, Diaz is completely misunderstood, as a lot of his "trash talking" is a direct result of his desire to be placed in the best fight possible.
That doesn't always mean he can get by without performing.
Diaz needs to put up or shut up.
Many may find Chael Sonnen to be quite hilarious, while others, not so much.
Unfortunately whether or not fans like him or not has nothing to do with Sonnen's performance inside the Octagon.
Sonnen is currently on the best stretch of his career but it means little to nothing without a win over Anderson Silva.
Sonnen can talk the talk but eventually he'll have to walk the walk.
It's likely Nate Diaz receives a bad rap from his brother Nick.
But, when the rubber meets the road, he's still a Diaz and he still likes to speak his mind.
Unfortunately for Nate, he isn't on the level of his brother, as he'll need to do a lot more putting up than Nick.
It didn't take long for Melvin Guillard to get a taste of reality when he met Joe Lauzon at UFC 136 in a fight that stood between him and a title shot.
Guillard was submitted in less than a minute but is back and ready to rumble.
This time Guillard needs to put together a performance instead of publicly taunting his opponent.
Brock Lesnar is slated to make his return to the Octagon after being away from the sport for more than a year.
In his return Lesnar will meet UFC newcomer Alistair Overeem in a bout that's been talked about in the mouths of more than just fans.
Lesnar and Overeem have had their fair share of words for each other leading up to their main event on December 30th.
Time to put up or shut up for Lesnar.
You may ask who Alex Caceres even, is which already proves my point.
Caceres has lost four of his last six bouts but was declared victorious in his recent victory over Cole Escovedo at UFC on FOX I.
Caceres is quickly becoming known as one of the more cockier fighters in the UFC today and will have to put up results in order to walk the walk.
No one will ever deny just how passionate Josh Koscheck is about fighting in the UFC.
However, at times Koscheck's passion turns into arrogance which in result has established him as one of the biggest trash talkers in the UFC today.
Koscheck has done a fairly good job in backing up with talks but will need to continue to do so as we approach the new year.
Everybody loves some Urijah Faber as he's one of the most-liked fighters in MMA today.
Recently Faber has been battling it out with Dominick Cruz via Twitter and is ready to take hold of the bantamweight championship.
However, Faber is 0-4 in his last four title fights which means he'll need to put up or shut up when he meets Cruz in 2012.
The same rules for Brock Lesnar apply to Alistair Overeem, who will be making his Octagon debut on December 30th.
Despite having never stepped foot inside the Octagon, Overeem has been far from shy as their date rapidly approaches.
Overeem needs to prove to the world he's more than just a trash talker and a fighter who gets the job done against washed-up competition.