Jono Carroll bounced back from his March defeat to Tevin Farmer with a unanimous decision victory over Mexican Eleazar Valenzuela in the early hours of Sunday morning.
The Irish super-featherweight lost to Farmer in what was his first world title bid but he was fancied to get past home hope Valenzuela on the undercard of Juan Francisco Estrada's WBC super-flyweight title defence against Dewayne Beamon.
He did just did that, outpointing his opponent over 10 lively rounds in Hermosillo.
Valenzuela came into this with a record of 20-11-4 (16 KOs) and he had his moments, connecting with two meaty lefts in the fourth and fifth rounds.
Carroll grew in stature as the contest progressed, however, and bossed the closing rounds, ultimately getting the verdict across all three judges' cards.
Estrada, meanwhile, stopped Beamon with a TKO in the ninth to defend his WBC and Ring Magazine super-flyweight crowns.