Jerwin would go on to win several national championships, including a gold medal at the Palarong Pambansa, before turning pro in 2009, at the age of 17.

Jerwin Ancajas suffered a loss in his fifteenth pro bout, losing a majority decision to Mark Anthony Geraldo.

Kinoshita beat the count but the referee stopped the fight, giving Ancajas a TKO win.

Ancajas was deducted a point in round 5 by referee Steve Gray, following a legitimate shot to Conlan's abdomen.

[10] In December, it was announced that Ancajas had signed with Top Rank and would make his U.S. debut in February 2018, defending his title against Israel González in Corpus Christi, Texas.

[14] Barrios proved a tough opponent for the IBF champion, but could only fight to a draw as Ancajas was able to keep his belt.

[18] Ancajas was scheduled to make his ninth IBF title defense against Jonathan Javier Rodriguez on April 10, 2021.