Check out the best photos from Yoel Romero's first-round knockout over Duane Crespo at Dirty Boxing Championship in Miami. (Photos courtesy of Dirty Boxing Championship)

Co-founded by Mike Perry, Dirty Boxing Championship is here to stay - or so it seems, after a thunderous knockout from former UFC star Yoel Romero dropped jaws at their debut event on Saturday night in Florida.

Former UFC and Bellator title challenger Yoel Romero wasted little time dispatching his opponent at the very first Dirty Boxing Championship event.

The former multiple-time UFC title challenger returns to action this Saturday in Miami, Fla., at Dirty Boxing Championship – a striking promotion owned by Mike Perry. Romero’s return didn’t fly under the radar; the promotion literally announced the fight on Friday evening, hours before the event.

Ex-UFC star Yoel Romero scored a vicious first-round knockout at the inaugural Dirty Boxing Championship event in Miami on Saturday.

At the inaugural Dirty Boxing Championship in Miami, Yoel Romero shocked everyone, including Jon Jones, with a devastating first-round knockout of Duane Crespo.

Like much of Dirty Boxing's debut show, which was held as a private event at an undisclosed location in Miami, Romero’s involvement was kept under wraps until he unexpectedly showed up to Friday's weigh-in for a heavyweight showdown against Power Slap veteran Duane Crespo.

Jon Jones was shocked by Yoel Romero's knockout at the 'Dirty Boxing' event, caught on camera in a viral reaction.

Check out UFC and Bellator veteran Yoel Romero as he demolishes Dana White’s Power Slap fighter Duane Crespo at Saturday’s Dirty Boxing Championship event.