Chris Chester, Graeme Horne and Kirk Dixon have all agreed new two-year deals with Hull FC. Second row Chester, 26, is one of the club's key players while fellow forward Horne, 20, is highly rated.
Centre Dixon, 20, who joined the club from Hull Ionians RUFC last August, has also done enough to earn a new deal.
They follow Jamie Thackray and Gareth Raynor in signing new deals while the club is still waiting for a response from stand-off Paul Cooke.