Goalkeeper Liam Roberts is to leave Millwall at the end of the month after failing to agree a new contract with the club.
The 30-year-old, who arrived at The Den on a free transfer from Middlesbrough a year ago, made six appearances for the club in all competitions, two of them in the Championship.
The last of those six games was Millwall's FA Cup fifth round defeat to Crystal Palace in March – during which the goalkeeper was red-carded for his infamous head-high challenge on Eagles forward Jean-Philippe Mateta.
Roberts, who apologised to Mateta after the Frenchman was hospitalised and received several stitches to his ear, became the target of what Millwall described as "abhorrent" online abuse in the wake of the incident.