UFC 155: 10 Things You Need to Know

10 Things You Need to Know about UFC 155

1. What time does UFC 155 start? UFC 155 airs this Saturday, December 29, at 10pm ET on pay per view. The undercard portion of the card kicks off with three free fights on Facebook about 6:35pm ET and continues on FX at 8pm ET with four more free fights.

2. Former rising star Todd Duffee makes his return to the UFC Octagon after being cut back in September of 2010. Duffee is tied with Ryan Jimmo for the fastest KO in UFC history at seven seconds (though Duane Ludwig would have something to say about that).

3. One-time title contender Melvin Guillard looks to rebound from a rough 13-month stretch that saw him lose 3 of his 4 fights. Guillard fights Jamie Varner on the FX portion of the undercard.

4. You might not be too familiar with undercard fighter Erik Perez, but you should be. The Jackson's MMA fighter has racked up seven wins in a row and also holds the fastest KO ever in the bantamweight division, a 17-second bashing of Ken Stone. Check out this Erik Perez interview

5. Middleweight Chris Leben returns to action after being suspended for a year for a failed drug test following his UFC 138 loss to Mark Munoz. Leben draws Strikeforce import Derek Brunson.

6. Alan Belcher's fight with Yushin Okami may go a long way in proving to Dana White and Joe Silva that he deserves the next shot at Anderson Silva. Belcher has quietly won his last four fights and six of his last seven.

7. Speaking of middleweight title shots, Tim Boetsch says his name better be in the conversation. Boetsch has won all four of his fights since dropping to middleweight, highlighted by wins over Yushin Okami and Hector Lombard.

8. Joe Lauzon says he's the most aggressive fighter in the UFC. Who could argue? Lauzon has cashed an "of the night" award check in 8 of his last 9 fights, and has won 11 bonuses total in his UFC career.

9. Cain Velasquez recovered nicely from his first career loss when he torched Antonio Silva at UFC 146 in May. Velasquez hasn't been to decision since June of '09, so odds are he'll be looking to do the same on Saturday - avoiding the judges at all costs. Cain Velasquez talks JDS fight

10. Ten fights. November 2007. That's how long it's been since Junior Dos Santos tasted defeat. It was also the only time he's been beaten. In that span, he's only gone to decision twice and has run through a who's who in the heavyweight division. He'll look to extend that impressive streak on Saturday when he battles Cain Velasquez in Las Vegas. JDS talks rematch with Cain

Check out the full UFC 155 Preview