Career
Early career
Sampo started his professional career in 2009. He fought mainly for Missouri-based promotions as Fight Maine Mobile Marketing Association , Wright Fights and Rumble Time Promotions. Legacy Fighting Championship
Sampo was expected to face Rafael de Freitas on September 14, 2012 at Legacy Football Club 14.
However, instead he faced Antonio Banuelos.
Championship Fighting Alliance
Sampo faced Olympic medallist and Bellator Mobile Marketing Association veteran Alexis Vila on January 19, 2013 at CFA 9: Night of Champions for the inaugural flyweight title. In November 2013, it was announced that Sampo had signed with the UFC. Ultimate Fighting Championship
Sampo made his promotional debut against fellow newcomer Ryan Benoit on November 30, 2013 at The Ultimate Fighter 18 Finale.
Sampo faced Zach Makovsky on February 22, 2014 at UFC 170. Sampo had his first octagon defeat via unanimous decision (30–27, 30–27, 29–28).
Sampo faced promotional newcomer Paddy Holohan on July 19, 2014 at UFC Fight Night: McGregor versus
Brandao. He lost via submission due to a rear-naked choke in the first round. Sampo faced Justin Scoggins on May 23, 2015 at UFC 187.
Sampo lost the fight via unanimous decision.
Subsequently, he was released from the promotion.