Castleford are seeking a stronger 2027 after finishing second last this season with eight wins and 19 losses.
Bulldogs forward Jack Todd has signed a two-year deal with the Tigers.
Todd joined the Bulldogs' pathways in 2019 and made his NRL debut in 2025 after breaking both arms.
The injuries delayed his arrival despite his readiness for Cameron Ciraldo's side.
He played four NRL matches, scoring in his second, before featuring in NSW Cup in 2026.
In 12 reserve-grade appearances this year, he made 14 tackle breaks, averaged 84 metres per game and recorded 92.5% tackle efficiency.
"Castleford seems like a really good place and a club that's on the up," Todd said in a Tigers statement.
He said he hoped his difficult run was behind him and he could string games together over the next two years.
Tigers rugby director Chris Chester welcomed Todd as a valuable addition and said the club looked forward to his contribution over the next two seasons.