Ultimate Fighter 13: Team Lesnar vs. Team Dos Santos

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In The Ultimate Fighter 13 [TUF 13], a group of welterweights [meet the fighters at ultimatefighter.com], including a state champion center fielder and a former lacrosse player, are coached by UFC heavyweights Brock Lesnar and Junior Dos Santos. TUF 13 premiered on March 30 to an overwhelming 1.5 million viewers, proving the sport continues to gain popularity. Check out the trailer below.

TUF 13 airs every Wednesday at 9 p.m. EDT on Spike TV. If you missed the first three episodes, get caught up at ultimatefighter.com.

Although ultimate fighters generally have backgrounds in combat sports such as martial arts, boxing or wrestling, traditional sport athletes have clearly embraced the intensity of mixed martial arts.

Former NFL running back Herschel Walker, as well as former pro football players Marcus Jones, Matt Mitrione, Brendan Schaub and Wes Shivers—all of whom competed on The Ultimate Fighter 10—proved successful in tackling MMA. Even Dallas Cowboys outside linebacker DeMarcus Ware has proclaimed his passion for MMA training.

Yes, some pro athletes are exploring the world of MMA training, but it may not be the best option for high school athletes. Before embarking on an Ultimate Fighter-style workout, be sure to read STACK expert Joe Dowdell's blog post, " target="_blank">"Is MMA Training Appropriate For Other Sports?".

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