Unbeaten duo Johnny Garton and John Coyle are among the final four names in the welterweight Prizefighter on April 5.
The winner-take-all tournament returns next month, with eight fighters battling for the £32,000 winner's cheque and the Prizefighter trophy at York Hall in Bethnal Green, live on Sky Sports.
Peckham's Garton puts his unbeaten 11-fight record on the line and will be joined by Essex fighter Coyle, who is yet to suffer defeat in four bouts.
The experienced Jason Cook, a former European champion at lightweight, is targeting another memorable triumph and Berkshire's Marc Douglas completes the entrants.
Former British light middleweight title challenger Erick Ochieng, Commonwealth Games gold medallist Paddy Gallagher, Midlands Area champion Sam Eggington and Dubliner Dean Byrne already have confirmed their participation.
Exciting middleweight John Ryder tops the bill and can land another British title shot with victory over Jez Wilson.
Ryder suffered a close points defeat against champion Billy Joe Saunders last September, but has continued his pursuit of the Lonsdale belt and faces Wilson in an eliminator.
Light-welterweight Ricky Boylan, another unbeaten prospect, returns to action on the card and cruiserweight Wadi Camacho will have a warm-up bout ahead of a rescheduled grudge match with Stephen Simmons.