Nick Mamalis is a talented bantamweight fighter training out of the Grudge Training Center in Colorado, USA. He comes from an athletic background having excelled in both football and wrestling while in high school. Talented and hardworking, Mamalis scored two consecutive upsets in his debut bouts in Bellator FC in order to earn an invite to the promotion's inaugural Bantamweight Grand Prix Tournament.

Mamalis comes from a solid wrestling base, having started his training at the age of six. From there he would go on to enjoy a very successful high school career, highlighted by three State Wrestling Championships (he was a four-time finalist) and three-time high school wrestling All-American honours. Collegiately, Mamalis would make his way to Western Wyoming Community College where he would earn All-American status and become a NJCAA National Runner Up in his only year wrestling there. That experience, combined with his training at the Grudge Training Center has played a pivotal role in shaping his game. Mamalis is a technically strong wrestler who competes at a very high pace. He's armed with a quick, effective sprawl and is deceptively strong having shown impressive slams and powerful double leg takedowns. Capable of taking his opponent down from anywhere, Mamalis shows good leg trips and a nice single leg from in close. Mamalis has a solid top game on the mat, working actively and showing very strong positional grappling awareness. He maintains good posture, works his guard passing, and utilizes his elbows and punches in a workmanlike manner. While Mamalis' offensive submission game continues to progress nicely, he will need to work on his submission defense, guard and BJJ going forward.

Despite his base, Mamalis has displayed comfort in keeping the fight standing. He's light and quick on his feet where he's proven to be an aggressive, willing combatant. Speed and quickness is a recurring theme in Mamalis' MMA makeup, as he's blessed with very good hand speed and the ability to deliver lightning quick high/low kicks. He possesses a nice cross, shows no hesitation in letting his strikes go, and has respectable power behind his punching. Mamalis is equipped with excellent cardio (he actually took a five round fight against Zach Wolff with less than 24 hours notice, fought very actively throughout, didn't tire and earned an impressively lopsided five round decision victory) and push the pace and work his jab-cross combination. His striking repertoire continues to expand as he demonstrates the capacity to throw quick flying knees and superman punches (sometimes thrown in combination). While Mamalis does do a good job of using his speed to get out of range, he also shows a tendency to keep his hands low and will need to further refine his defensive abilities. Although technically there is work to be done, overall Mamalis has made steady progress and taken to his striking game with an excellent attitude.