Under the guidance of trainer Anthony Farnell, Collymore (26) defeated tough Latvian Kristaps Zulgis on points at a Black Flash Promotions show at the Bowlers Exhibition Centre in Trafford Park.
Referee Darren Sarginson scored the six-round contest 60 points to 54 in Collymore's favour, meaning he won every round.
Collymore's impressive record now reads six wins and a draw from seven professional fights, and his support base is growing with every outing.
He is hoping to be back in the ring before the end of next month.
