Any fighter in the sport of mixed martial arts knows that losing is part of the job. No man can be perfect every night out and it's the best who realize this.
Every year in the UFC, fighters come along that look unstoppable, or at least good enough to earn the infamous, "next big thing" label.
Brock Lesnar is a primary example. Lesnar brought his fame from the WWE arena and earned a shot in the UFC after just one professional fight. Although he finished with a 5-3 career record before diverticulitis took his MMA career, he won the UFC Heavyweight title in just his fourth professional fight and defended it two more times for an unprecedented, yet underachieving career.
While it is hard to peg just a few guys who fit the description in the UFC, performances in big UFC fights separates a few fighters from the pack.
The five fighters on this list entered the UFC with high expectations and may have even notched big victories with the promotion, but key losses have plagued their shot at truly elite status.
Here are the 5 most underachieving fighters in the UFC today.