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MMA Odds: UFC 137 Betting Preview

The UFC 137 fight card has lost Georges St-Pierre, but it still features Strikeforce Welterweight champion Nick Diaz’s return to the promotion in a top-contender fight against MMA legend B.J. Penn.

St-Pierre pulled out of UFC 137 on Tuesday after suffering a knee injury in training, scrapping his scheduled bout with former WEC champ Carlos Condit. He's expected to be out of action for about a month; St-Pierre was the -440 favorite at 5Dimes to retain his belt.

That leaves the Welterweight bout between Diaz and Penn as the main event on the UFC 137 betting card in Las Vegas on October 29. As well, there are interesting matchups in the Heavyweight and Lightweight divisions.

ADVERTISEMENT: See all the latest UFC 137 betting lines, including odds to win round by round, will fights go to decision or end by submission and more - visit MMA pioneer Bovada before Saturday's action throws down.

Diaz had his title shot stripped from him after failing to attend promotional events and now will have to get past Penn to earn another shot at the UFC Welterweight belt. Oddsmakers at 5Dimes have this fight even at -110, but initially had Penn as a -135 favorite. [ See full in-depth story on betting action based on UFC 137 odds ]

In an interesting Heavyweight matchup Ultimate Fighter winner Matt Mitrione will take a step up in competition against UFC gatekeeper Cheick Kongo. Mitrione has never been in the Octagon with any fighter the level of Kongo, yet somehow the hype around him has made him a -140 favorite in this fight.

As a +120 underdog the vastly more experienced Kongo looks like big value against an inexperienced and over-hyped opponent who intends to stand and bang with him.

UFC 137 will also feature two contenders in the talent-rich Lightweight division when Dennis Siver and Donald Cerrone step into the Octagon. Both fighters are on lengthy win streaks, but it’s Cerrone that’s handicapped as the 5Dimes -220 favorite. Siver’s one-dimensional striking approach is the reason he’s the +180 underdog, but if he can keep the fight standing he could out-strike Cerrone for the victory.