Complex sentence: He has held the WBO super featherweight title since 2016, having previously held the WBO featherweight title from 2014 to 2016; he won the latter title in his third professional fight.
Split into simpler sentences: He has held the WBO super featherweight title since 2016, having previously held the WBO featherweight title from 2014 to 2016. He won the latter title in his third professional fight.