Top-scorer Kieran Sadlier to leave Doncaster Rovers
Rovers have also taken up an option on promising young midfielder AJ Greaves, keeping him at the club until 2021.
The club's retained list has also revealed that forward Devante Cole and defender Alex Baptiste will leave the club.
Out-of-contract under-23 squad players Max Watters, Shane Blaney, Rieves Boocock, Myron Gibbons, and Rian McLean have not been offered new deals.
Losing Sadlier will be a blow for Rovers, with the 25-year-old, linked with a move to Hull City, topping the scoring charts for Doncaster in 2019-20 with 12 goals in 40 appearances.