UFC Fight Night 106: Belfort vs. Gastelum: UFC Fight Night 106: Belfort vs. Gastelum was a mixed martial arts event produced by the Ultimate Fighting Championship held on March 11, 2017, at the Centro de Formação Olímpica do Nordeste in Fortaleza, Brazil. A middleweight bout between former UFC Light Heavyweight Champion and UFC 12 Heavyweight Tournament winner Vitor Belfort and The Ultimate Fighter: Team Jones vs. Team Sonnen middleweight winner Kelvin Gastelum was the event headliner.