In a year that was filled with highlight reel KO's, there were 5 that stood out from the rest. They were not only huge fights in their own right, they included some of the biggest names in MMA at some of their biggest moments.
Huge career implications at stake.
Some kept the hope alive for an extended UFC run, while others seemed to fall further from the spotlight and closer to retirement.
Let's revisit 5 of the years best KO's as we get ready to usher in 2011 ...