Scorpions Head Coach Dave Clark said: “Nathan was an outstanding club man last year both on and off the field for us. His professionalism was outstanding and he did a lot of work for us in the community.
Mossop followed Clark to Neath after Barrow were relegated from the Championship, after revelations about the club’s finances, which saw then chairman Des Johnston handed an eight year ban from rugby league.
He scored 15 tries in 20 appearances for Scorpions, his last appearance coming in the 32-10 win over Gateshead in August.
“In particular I would like to thank Dave Clark and chairman Phil Davies for their continued support and guidance throughout my year at the club.”