(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.

With no fight this week, UFC president Dana White released a video blog that shows what he and his "idiot friends" do when visiting his place in Maine. Yes, there's plenty of NSFW language. Take a look and see what White and his friends are up to, including:

1. Talk one friend into trying the spiciest hot sauce ever.
2. Blow things up.
3. Shoot guns while calling each other a nickname for a cat.
4. Apple-picking, though it doesn't look like they're picking honeycrisp apples, the finest of all apple varieties.
5. Milk goats in a way that looks pretty uncomfortable for the goat.
6. Drive motorcycles.

[Also: Nick Diaz can cry foul all he wants, but he's not getting a rematch with GSP]

And a little advice for Nick the Tooth. I was once told at an Indian restaurant, after eating very spicy food, that beer or soda pop are your best bets to cool a burning mouth.

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(Getty)It was a fight-packed episode of "The Ultimate Fighter" as Tuesday night's episode had two fights and visits from two different champs.

Ronda Rousey stops by -- Kelvin won his first match, so he was rewarded with a visit with UFC women's bantamweight champion Ronda Rousey. It wasn't just for show, either, as Rousey showed Team Sonnen several judo techniques. She also pumped them up with some of her favorite "Momisms," including the choice line, "No one has the right to beat you."

Collin Hart (Team Jones) vs. Kelvin Gastellum (Team Sonnen)

Gastellum said in his pre-fight interviews that no one respects his boxing. Uh, they will now. Gastellum struck Hart quickly with a left hook that sent him down to the ground. Hart hit his head on the canvas, rolled over, and took a few more punches before the fight was stopped. It was a vicious, vicious knockout.

Mike Tyson! Oh, hey, no big deal. Mike Tyson showed up at the training center. He stopped in the locker rooms to say hello to the fighters.

Dylan Andrews (Team Jones) vs. Luke Barnatt (Team Sonnen)

A fight for the Queen as Australian Andrews takes on Brit Barnatt. Andrews got the takedown early in the first round, and Barnatt had no answer on the ground for much of the round. Andrews tried for a few chokes, but was unsuccessful.

Barnatt did a much better job in the second, creating offense from the bottom. This led to a third round, where Andrews took over. He knocked a clearly tired Barnatt around until he finally knocked him out in the third round.

Everyone was impressed with how Andrews fought through the third round, including the man signing the checks.

"I'm blown away and impressed with Dylan. That's how it's done here." — Dana White

The next two quarterfinals are next week, and they'll have a tough act to follow.

(Via Twitter.com/BensonHenderson)

UFC lightweight champion Benson Henderson will fight Gilbert Melendez on April 20, but he took on other competitors over the weekend. Henderson competed in the 2013 Pan Jiu-Jitsu Championships. He won his first two matches, but lost 8-0 to Jaime Soares Canuto.

Henderson, a brown belt in jiu-jitsu, decided to do the tournament for fun. It wasn't a break from training for the bout with Melendez. Henderson's coach said he did six rounds of MMA sparring on Saturday before competing on Sunday. Instead, it was just a little bit of competition.

He tweeted about the tournament:

Guess who still got #OnePercentBetter today??? That's right, this guy did...congrats to all the #PanAms2013 winners twitpic.com/ce5c8n

— Benson Henderson (@BensonHenderson) March 25, 2013

Just got done w/#2013PanAm 's, didn't go the way I wanted, 2-1, on the day, lost 8-0...had a blast, MUCH LOVE to the #BJJ community...

— Benson Henderson (@BensonHenderson) March 25, 2013

What are your thoughts on Henderson competing just weeks before his fight? Speak up in the comments, on Facebook or on Twitter.

The last time we saw UFC welterweight champion Georges St-Pierre, he was defending his belt against Nick Diaz at UFC 158. But now you'll get to see him outside the cage, as he was just cast in "Captain America: The Winter Soldier." GSP will play Batroc the Leaper, a French mercenary and kickboxer with a penchant for kicking Captain America.

[Related: Georges St-Pierre apologizes for controversial fight attire]

GSP is the perfect fit. He's French-Canadian, and French was his first language. As for the kicking:

(Getty)UFC featherweight Chan Sung Jung has a fight with Ricardo Lamas coming up in July. The fight will likely have title implications, and will give "The Korean Zombie" a chance to prove he belongs at the top of the UFC's 145-lb. class. But the upcoming fight didn't keep Jung from speaking up to one of the UFC's biggest stars.

Jung posted a letter on his Facebook page to UFC welterweight champion Georges St-Pierre about the Rising Sun symbol GSP wore to his fight with Nick Diaz.

Dear Mr. Georges St. Pierre
Hi, My name is Chan Sung Jung from South Korea. As one of many Koreans who like you as an incredible athlete, I feel like I should tell you that many Korean fans, including myself, were shocked to see you in your gi designed after the Japanese 'Rising Sun Flag'. For Asians, this flag is a symbol of war crimes, much like the German Hakenkreuzflagge. Did you know that? I hope not.

Just like Nazis, the Japanese also committed atrocities under the name of 'Militarism'. You can easily learn what they've done by googling (please do), although it's only the tiny tip of an enormous iceberg.

Furthermore, the Japanese Government never gave a sincere apology, and still to this day, so many victims are dying in pain, heartbroken, without being compensated. But many westerners like to wear clothes designed after the symbol under which so many war crimes and so much tragedy happened, which is ridiculous.