Chris Leben is considered one of the best strike takers in MMA. Leben has shown time and time again that you can hit him as hard as you want and he'll be crazy enough to keep moving forward.
In Anderson Silva's Octagon debut he was able to end the young Leben's night in only a minute. At one point in the fight, Silva drops Leben with a left hook and doesn't go in for the kill while Leben is down and hurt.
Luckily for Silva, the fight only lasted a little bit longer. All it took to finish the fight was one knee to the head of Leben and he was out for the count.
This was the first time in Leben's career that he was knocked out, and it wouldn't happen again until UFC 125 when Brian Stann was able to do it in just under four minutes.
This was Silva's first win in the UFC, and in his next fight he would finish Rich Franklin to earn the UFC Middleweight belt, which he has yet to relinquish.
Leben has gone 7-5 since this fight and is most recently coming off of a knockout victory against Wanderlei Silva. Leben will face Mark Munoz at UFC 138 in England for the first five-round non-title fight in the history of the UFC.
You can check out Blake Dreisbach's "Submission of the Day" article, here.