Six youngsters have signed new deals at St Helens, with two immediately joining Leigh on loan.
Ricky Bailey and Jonah Cunningham, son of Saints legend Keiron, will spend 2018 with the Centurions.
Jake Spedding, Liam Cooper, Ben Morris and Aaron Smith have also extended their contracts by a season.
Justin Holbrook said: “It’s good to have these younger players back on board as we continue to build for the next season.
“They have all worked hard to secure these contracts, either on loan or in the reserves this year, and we hope to see them improve further in 2018.
“We’re also looking forward to seeing the progression of Jonah and Ricky at Leigh and we thank Neil Jukes and Keiron Cunningham for their help.”
The four players remaining at Totally Wicked Stadium will be given opportunities via dual registration or loan system this season, the club has confirmed.
Saints also say they are hopeful that reserve team fixtures can be arranged for younger members of its squad.