Cain Velasquez Tore His ACL Before Junior Dos Santos Fight at UFC on FOX

McKinley NobleCorrespondent IDecember 18, 2012

SYDNEY, AUSTRALIA - FEBRUARY 29:  UFC heavyweight champion Cain Velasquez of the United States poses for a portrait at Tramway Oval on February 29, 2012 in Sydney, Australia.  (Photo by Cameron Spencer/Getty Images)
Cameron Spencer/Getty Images

During the main event of the first UFC on FOX fight card, hours of pre-fight buildup ended in anticlimatic fashion when Junior dos Santos knocked out Cain Velasquez early.

It appeared that Velasquez had gotten "caught" on the feet, but a recent video shows that the former heavyweight champion came into the bout injured.

MiddleEasy shares a video of Velasquez tearing his ACL just days before the fight, captured on film by videographer Bobby Razak:

Just fourteen days before his UFC on FOX showdown against Junior dos Santos on November 12, 2011, Bobby Razak set up his cameras in order to prepare for a Dethrone commercial and managed to capture Cain Velasquez tearing his ACL on the training mat.

Razak didn't release the video for the obvious reasons, but now over a year later the MMA world is on the verge of another Junior dos Santos vs. Cain Velasquez showdown and we thought this video would be highly appropriate leading up to UFC 155.

As shown in the footage, the injury to Velasquez's knee occurred in a freak accident, with the American Kickboxing Academy member visibly in pain after the ACL tear.

ACL injuries have plagued several UFC fighters in the last couple of years, with the most high profile injury sidelining welterweight champion Georges St-Pierre for several months of an 18 month layoff.

Even lightweight contender Gray Maynard has gone down to a knee injury (citing a persisting three-year affliction), pulling himself out of a UFC 155 bout with Joe Lauzon.

Additionally, UFC bantamweight champion Dominick Cruz looks to potentially miss all of 2013 due to surgical complications stemming from an ACL tear suffered during filming of The Ultimate Fighter: Live.

Unlike most fighters, though, Velasquez concealed his injury (or at the very least, may have suffered through it at the UFC's request) throughout the aftermath. It's possible that it may have affected his footwork, as JDS was able to hit him standing with a long overhand right behind the ear.