Castleford Tigers have loaned out half-back Ben Johnston and utility back James Clare to Dewsbury and Doncaster respectively.
Johnston, 20, spent time with the York City Knights last season before returning to make his Super League debut for the Tigers.
Clare made three Super League appearances in 2012 for Castleford, who retain a 24-hour recall clause after 28 days from February.
Castleford's head of youth development Steve Gill is looking forward to the pair progressing elsewhere with the Super League Under-20's disbanding.
"The loan spell will offer the opportunity for them to step up to regular first-team rugby which will no doubt enable them to further develop as players," Gill told the Tigers' official website.
"We hope it won't be long before they are making their mark in Super League for the Tigers."
Doncaster claimed their first trophy in 61 years when they beat Barrow Raiders in the Championship One Grand Final in October and Clare believes the South Yorkshire club are a side on the up.
"There were quite a few clubs who wanted me to sign for them with the Super League under 20's disbanding but it was my decision to join Doncaster," he told Doncaster's official website.
"The Dons have just had an excellent season and everything seemed right about the club during our discussions.
"I met up with (coach Tony Miller) this week and had a good look around the Keepmoat Stadium and I was really impressed with the facilities they have there. I hope to have a really good season with the club."