Dasmariñas made his professional debut on 15 January 2012, scoring a four-round unanimous decision (UD) victory against Wilmar Pragata in Lipas, Philippines.
[3] After compiling a record of 18–1 (11 KOs), he faced reigning champion Lwandile Sityatha for the IBO super-flyweight title on 13 December 2014 at the Orient Theater in East London, South Africa.
After suffering a cut above his right eye in the sixth round due to an accidental clash of heads, Dasmariñas captured the WBC Youth title via ten-round UD, with the judges' scorecards reading 97–92, 96–93, 96–93.
[6] Dasmariñas moved up a weight class for his next fight, defeating Jecker Buhawe via fourth-round technical knockout (TKO) to capture the vacant PBF bantamweight title on 29 April 2016 in Muntinlupa, Philippines.
[8] Four fights later he faced reigning champion Naoya Inoue on 19 June 2021 for the unified WBA (Super), IBF, and The Ring bantamweight titles at the Virgin Hotels Las Vegas.