Not only will Anthony Pettis no longer fight Josh Thomson at UFC on FOX 9 next month due to a knee injury, but looks as though the lightweight champ’s first title defense could be a months away. Details are emerging regarding the extent of “Showtime’s” injury and Pettis likely will need surgery to repair his knee.

Recently the 26 year-old fighter spoke to the Milwaukee Wisconsin Sentinel Journal, and here is some of what Pettis had to say about the injury:

“We’re thinking about operating,” Pettis said. “Most doctors don’t operate on PCLs, so no one has a clear answer at this point. I’m going to L.A. after my brother’s fight to get another opinion.

“If I do need surgery, the time frame is four to six months off. If we decide to rehab, it’s another four to six weeks. I’m hoping for no surgery, but I don’t want this to be something that keeps happening.”

If you recall, Pettis hurt his knee during his championship winning performance versus Benson Henderson at UFC 164 in August. It turns out that the feared finisher had not fully recovered from the injury when he resumed training recently.

“I gave it two good months of rehab and the first time I came back (to train in the gym) I got a light kick in the shin and it swelled up real bad,” Pettis said.

It should also be noted that UFC President Dana White recently told MMA that he’s certain Pettis will require surgery. So, if you factor in four to six months of recovery time, plus a full training camp, there’s a chance Pettis won’t fight again until next summer. White also said that the promotion will likely book another bout for Thomson. Hope about Thomson versus TJ Grant?

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