(Instagram)As we mentioned on Monday, Saturday's main event UFC bout between Gegard Mousasi and Alexander Gustafsson could be in trouble because of a facial laceration suffered by Gustafsson. Wanderlei Silva saw this news, and seized upon it to play an April Fool's Joke that wasn't really all that funny.

He tweeted this info late Monday afternoon:

UFC news my guys fight Saturday agains Musasi!!! What you think? UFC just contact me about Saturday,UFC acabeu de me ligar o que acha?

— Wanderlei Silva (@wandfc) April 1, 2013

No one from the UFC confirmed that Silva was taking Gustafsson's place, but Silva kept playing up the "joke." He tweeted news stories about him taking the fight. Even Mousasi tweeted about it:

@ufc @danawhite at this moment I do not have any new info about my situationBut if ufc want's and mr @wandfc is ready for me than let's Go!

— Gegard Mousasi (@mousasi_mma) April 1, 2013

But on Tuesday morning, Silva admitted it was a joke. He posted the above picture on his Instagram account, with the caption:

I catch you wand the best April first ever!! But I would like this to be true!!!

Ummm, OK. For one, is that funny? The MMA website Middle Easy pulled a good April Fool's Day prank by redesigning their website as if it was 1996. Hulu changed all their show titles to fake shows like "The Rural Juror" and "Ya Herd? With Perd." But saying you have a fight when you don't?

If Silva wants to say he is next man up for the bout with Mousasi in case Gustafsson can't fight, that's fine. He should just do that. But taking everyone in the MMA world, even a potential opponent, for a ride with a so-called joke? That's not cool, Axe Murderer.

UFC welterweight Nick Diaz has said he is thinking about retirement or a rematch with Georges St-Pierre. But if he's looking for another challenge, perhaps he can join the World Nunchaku Association? Yes, it's a real thing. They have championships and everything. Diaz showed off his skill with the nunchaku and what looks like a homemade tetherball in this video. It's pretty spectacular.

Thanks, MMA Fighting.

(Getty)Reports made the rounds on Sunday that this weekend's bout between Gegard Mousasi and Alexander Gustafsson was off. News outlets from Sweden said Gustaffson suffered a cut on his face that would take weeks to heal, and doctors wouldn't clear him. But the UFC disagrees.

UFC president Dana White told MMA Fighting that the bout is still on. Mousasi-Gustafsson is set for the main event for Saturday's card in Stockholm.

"The [Swedish Mixed Martial Arts Federation] has not said he can't fight, and he wants to fight," White texted to reporter Ariel Helwani.

Gustafsson is from Sweden and is popular in his home country. Besides wanting to fight in front of his home crowd, Gustafsson has another incentive to want the fight with Mousasi to happen. He's riding a six-fight win streak, with his last win coming over former UFC light heavyweight champ Mauricio "Shogun" Rua. A win over Mousasi could put Gustafsson on the top of the pile of 205 lbers looking for a shot at the title. He even has plans to push for a title shot after the fight.

"My biggest concern right now is Mousasi," Gustafsson said in early March. "That's my biggest focus. It's the only thing I think of right now. I don't really think about [being No. 1] that much. I'm going to grab the mic from whoever has it after the fight and I'm going to challenge the champ after this fight, so let's see what happens."

But a facial laceration could thwart his plans. The fight is on, but it should be an interesting week as we watch if the fight still happens on Saturday.

Chan Sung Jung talks to a fan. (Getty)

It's been a slow week for MMA, but it's likely to pick up as we start an eventful April. In this last week of March, who was hot or who was not?

Hot — Boston: According to a tweet from UFC president Dana White, the promotion is headed back to Boston, his hometown. Fox's new channel, Fox Sports 1, will get its first UFC event with this card, scheduled for Aug. 17.

Not — Commissions: First, Nick Diaz's camp said his weigh-in at UFC 158 was mishandled by the commission in Quebec. Then, Andrei Arlovski's camp said there was a timing error at the World Series of Fighting 2 card that caused Arlovski to take extra damage. Commissions' doing things right is necessary for the sport to grow, so mistakes like these are worrisome.

(Getty)Just days after Nick Diaz's camp criticized the athletic commission in Quebec for their handling of his UFC 158 weigh-in with UFC welterweight champ Georges St-Pierre, another athletic commission is under fire. Jackson's MMA, the gym who backs Andrei Arlovski, said a timing error by the New Jersey State Athletic Control Board resulted in Arlovski's broken jaw.

Arlovski lost to Anthony Johnson in a World Series of Fighting bout on Saturday. Jackson's MMA posted on their Facebook about the timekeeping problem:

The NJ athletic commission was worried about the World Series of Fighting getting a new canvas and new corner pads for the cage they almost canceled the fight Saturday night. Unfortunately they forgot to get a time keeper that was trained properly. 1st round 5min 8 sec in the Andrei fight. A devastating blow was landed after the 5min mark. It's amazing how so much time is spent with over regulating but the simple things can cost dearly.

WSOF had to bring in a new canvas and pads when the ones they originally had were unsuitable. But the timing error is much worse. Check out this video via MMA Fighting, and listen to the wood clacking at the 10-second mark. The clock disappears from the screen at seven seconds. Even a generous countdown shows the fight went past the five-minute mark.

The worst part is that the damage Johnson caused came after the time should have expired. His jaw was broken, and it needed surgery for repair. It also raises questions on if the fight result would have been different if Arlovski wouldn't have been hurt late in the first round.

(Getty)Sunday will mark the end of the first quarter. It's been a busy three months in MMA, so it's a good time to look back at the past three months and see who rose above the rest.

Biggest upset: Did you expect to see Robbie Lawler walk away with the win over Josh Koscheck at UFC 157? What about Antonio Rogerio Nogueira beating former UFC light heavyweight champ Rashad Evans? But there's no question who scored the biggest upset of the first quarter of 2013. Antonio Silva's TKO of Alistair Overeem at UFC 156 left more than Overeem's jaw on the floor.

Best knockout: Vitor Belfort's knockout of Michael Bisping at the January UFC on FX was memorable, as was Tyron Woodley's 36-second dismantling of Jay Hieron at UFC 156. Wanderlei Silva, Robbie Lawler and a slew of Bellator fighters have posted impressive knockouts. But the one that had everyone talking was on "The Ultimate Fighter." Uriah Hall's knockout of Adam Cella* was perfectly executed, and had the rest of the TUF house worried about Hall's skills. For that, Hall wins knockout of the first quarter.

The flying arm bar is one of those submissions that happens so quickly, that you need to look twice to realize what happened. Skip to the 1:10 mark in this video and you'll see Oliver Fontaine pull it off at the Lyon Fighting Championship in France. And you have to feel for his opponent, Sofian Benchohra, who never saw the arm bar coming. With a record of 4-7-1, he hasn't won a fight since October of 2010.

Thanks, MMA Fighting.

(Getty)For Americans visiting Canada, the cell phone charges can sometimes creep up on you. Your phone will work the same, but weeks later, you get a shocking cell phone bill. UFC featherweight Darren Elkins wasn't going to get hit with that massive phone bill during his trip to Montreal for UFC 158. He ignored phone calls.

[Also: Video blog shows the other side of UFC's Dana White]

Of course, that also meant he nearly missed his chance at filling in at UFC on Fox 7 after Clay Guida pulled out of his bout with Chad Mendes because of an injury.

"Up there (in Canada) I had my phone turned off," Elkins today told MMAjunkie.com Radio "You've got those ridiculous roaming charges and stuff."

His manager ran him down and broke the news of the potential fight. Elkins will face Mendes, the one-time featherweight contender, just a month after fighting Antonio Carvalho and winning with a controversial TKO. Elkins is on a five-fight win streak, so a win over Mendes could push him closer to a title shot.

It's the kind of fight that's definitely worth the roaming charges.