File this one under "unexpected but it probably shouldn't be."

Not only did Quinton Jackson suffer a knee injury while he was training for his fight against Ryan Bader at UFC 144 on Sat., Feb. 25, 2012, in Saitama, Japan, he was also suffering from something else.

Low testosterone.

Apparently, after visiting with his doctor, "Rampage" was referred to an age-management physician who tested him and concluded he was low on testosterone. So he went on the dreaded testosterone replacement therapy (TRT) you've heard so much about in mixed martial arts (MMA).

Fighters Only talks to Jackson and gets the story:

"I almost pulled out but then I went to see the doctor and he told me to talk to an age-management doctor. So I went and talked to them and they tested me and said my testosterone was low; they prescribed me testosterone, to bring my testosterone levels back up to levels where I can be like... so that I am the same as young people, like when I was 25, and it would help build my knee up. I hurt my knee like a month ago and I only did three shots of testosterone but it put a lot of weight on me, a lot of muscle on me but it healed me knee up good enough to where I could fight."

So he busted up his knee, got fat because of that, went to an age-management doctor who prescribed him testosterone and then he also got fat because of that but it helped him heal his knee enough to fight. But fight fat.

And lose.

But there is good news in all this. Despite all the questions regarding Jackson's desire to continue his career in MMA, he says he's a changed man thanks to the TRT:

"I gave myself small doses and that shit immediately changed me, that's why I am saying now I am not going to retire. I am not gonna retire no time soon, its just unfortunate that I got this injury. I started hitting it up pretty good, I still gotta take care of my knee but I feel like a 25 year old again. My sex life changed, I was back to five times a night like when I was 25, straight up."

Sounds good, no?

The cloud surrounding TRT still hovers and shows no signs of fading away. There are still most certainly quite a few folks who believe it's wrong to use it, no matter the circumstances.

How does "Rampage" feel?

"So I spoke to the UFC and they were like ‘yeah, a lot of fighters are probably doing it but not telling anyone.' Me, I keep it real, I am not doing anything wrong. Its legal and I am not abusing it and I am not going over certain levels. From what I learned about it, when I got tested my levels my levels were really low and the doctor was telling me that athletes can burn testosterone."

He goes on to reiterate that he's not retiring and he even says he wishes he had found TRT sooner.

Head on over to Fighters Only for the full read, as there is much more to the story but let's hear how you feel about this one, Maniacs.