(Shoulda stayed in dental school, Gilbert.)

By Scott Harris

It happens at least once or twice on every MMA fight card. An inside leg kick goes awry and catches an unsuspecting opponent in his sensitive area. The action stops, the fighter goes to one knee, lets the pain subside, collects himself and tells the ref he’s ready to continue. The perpetrator offers an apologetic glove touch, and we’re back in business.

This list is not about those times. These are the lowest low blows in MMA…

Click here to read this feature on BleacherReport.com/MMA — if you have the balls for it.

(One of the few moments on Saturday when Travis Browne wasn’t in danger of getting his nuts demolished. Photo courtesy of MMAFighting.com)

Though many UFC fighters have gotten bad reputations for everything from eye-poking to greasing, nobody’s as consistently rotten as heavyweight Cheick Kongo, who put on another notorious performance against Travis Browne at UFC 120. Kongo started things off in the second round by launching his trademark strike — a knee to the balls, straight up the middle — and wound up costing himself the victory in the third frame when he continued to grab Browne’s shorts despite warnings from the ref; the resulting point-deduction led to a unanimous 28-28 judges’ decision. At this point, it’s pretty much indisputable that Kongo is the dirtiest fighter currently on the UFC roster. Who could forget his other career highlights…

vs. Paul Buentello at UFC Live: Vera vs. Jones: After being warned by Herb Dean for shots to the back of the head and 12-to-6 elbows in the second round, Kongo is finally deducted a point for kneeing Buentello in the head while Buentello was down. Later in the round, Kongo connects with another knee to his downed opponent’s dome, though Dean brushes it off, saying Buentello was trying to draw the foul.