Finnley Thompson has signed a deal with the Rams until the end of the 2027 season.
Thompson previously had playing time with Wakefield Trinity before going on to play for the Bradford Bulls this year, where he was named the reserve team captain.
Paul March said: “He’s another young promising player we can play in the middle or the back row,
“Like so many others, he’s coming for an opportunity to play on the first-team, and I’m sure he’ll repay us with his worth ethic and drive to succeed”
Finnley will join the Rams as we look to strengthen the team for the final push of this season and then next year’s campaign.