Gillingham manager Martin Allen has confirmed that midfielder Charlie Lee and striker Adam Birchall have been made available for transfer.
Lee joined the Gills from Peterborough United in 2011 and played 35 times last season, while Birchall failed to score in 15 appearances.
Allen told BBC Sport: "Both are good players, both have been good professionals.
"Both players are really good people and this is a tough decision for me."
Allen guided the Kent club to promotion from League Two last season.
