Since 10 years old, Gelin taught himself to play the trumpet simply by emulating his favorite records After years of self-tutelage, Adrian D’Aguilar, bass player, began to mentor him; thereby, providing him the tools to play jazz. In the span of three years, Gelin has played with pioneers of the NY jazz scene such as Curtis Lundy, Bobby Watson, Roy Hargrove, Sullivan Fortner, Wynton Marsalis, Ben Wolfe, and Jon Batiste. Additionally, the 21-year-old trumpeter is the protege of the late, Roy Hargrove. Through his quintet, the young trumpeter brings forth a new narrative to jazz music.