UFC 141 Results: Brock Lesnar's Greatest MMA Moments

Tonight at UFC 141, Brock Lesnar retired following a TKO loss to Alistair Overeem. 

Lesnar fought just eight MMA fights. 

But in that short amount of time, Lesnar became UFC champion, defeated some of the best in MMA history, and became the UFC's biggest draw. 

Although some may not want to see Lesnar go, now is the right time. 

Here's a look at Lesnar's greatest MMA moments. 

Brock Lesnar's MMA Debut

On June 2, 2007, Brock Lesnar had his first professional MMA fight against Min-Soo Kim at K-1's Dynamite!! USA. 

Lesnar was a former WWE champion and had a failed attempt at playing in the NFL. 

Although many people may have believed he would fail in MMA, Lesnar had a strong collegiate wrestling background. 

Lesnar won his debut pretty convincingly by submission due to strikes in the first round. 

UFC Debut Against Frank Mir

Brock Lesnar signed with the UFC just one fight into his MMA career. 

Many people believed he didn't deserve a UFC contract just yet. 

Lesnar wouldn't have an easy first fight as he took on former heavyweight champion Frank Mir. 

Despite losing the fight, Lesnar held his own, taking Mir down twice and landing many punches. 

Although Lesnar made a rookie mistake that cost him the win, he proved he belonged in the UFC. 

Dominating Heath Herring

Photo courtesy of the UFC/Zuffa

In Lesnar's third fight, he faced tough veteran Heath Herring. 

Lesnar dropped Herring early in the fight and dominated him for all three rounds. 

Lesnar not only broke Herring's orbital bone, but he once again proved once again that he belonged with some of the best fighters in the world. 

Winning the UFC Heavyweight Championship

At UFC 91, Brock Lesnar met UFC Hall of Famer Randy Couture for the heavyweight title.

Many fans believed Lesnar did not deserve the title shot against Couture. 

They may have been right considering Lesnar was just 2-1 in his MMA career at the time. 

Despite this, Lesnar proved everyone wrong when he defeated Couture by TKO. 

The man who was a former "fake wrestling" champion was now sitting at the top of the UFC. 

UFC 100 Revenge Against Frank Mir

Jon Kopaloff/Getty Images

UFC 100 was the UFC's biggest event at the time. 

Headlining it was none other than Brock Lesnar and Frank Mir.

After much trash talk and pre-fight hype leading up to the event, Lesnar got the chance to gain revenge on the only man ever to beat him. 

Lesnar was able to take Mir down and control him on the ground through a round and a half before the ref stopped the fight. 

Lesnar's TKO victory cemented him as not only the best heavyweight in the world, but also the best attraction in MMA. 

Not only was Lesnar's win memorable, his post-fight speech is one of the most infamous in UFC history. 

Return at UFC 116

Before Brock Lesnar could make his second title defense, he came down with an illness that forced him to drop out of two scheduled fights with Shane Carwin. 

The illness turned out to be a serious case of diverticulitis, and nearly took Lesnar's life. 

Lesnar could have easily walked away from MMA knowing this disease put a lot of stress on his body. 

Instead, Lesnar got himself back into shape and made his return at UFC 116. 

After nearly losing the fight in the first round, Lesnar bounced back and submitted Carwin in the second. 

Lesnar showed that he had a ton of heart, not just for surviving Carwin's onslaught, but for returning from a deadly illness. 

Coaching on The Ultimate Fighter 13

Although the season he coached may not have been the most entertaining, for Brock Lesnar to coach on The Ultimate Fighter was still a big accomplishment. 

Some of the best fighters in UFC history have coached on TUF.

Although Lesnar is usually a private person, he agreed to do the show in order to get a fight with opposite coach Junior dos Santos.

The winner of the fight would get a shot at UFC champion Cain Velasquez.

Although Lesnar would not make it to the fight because of a second bout with diverticulitis, he did coach the winner of that season's TUF, Tony Ferguson.