The Ospreys can confirm backrower Guido Volpi will leave the regional rugby franchise at the end of this season.
Volpi, 25, will join the Doncaster Knights on a two-year deal after spending the last season on loan with the English Championship side.
The Argentine arrived at the Liberty Stadium from Narbonne in France at the start of the 2018-19 season and played seven times for the Ospreys.