Fleetwood Town have released Shaun Beeley, Ryan Crowther, Steven Gillespie and Alex Titchiner.
The Sky Bet League 2 club mutually terminated the contracts of all the players.
Full-back Beeley recently returned from a loan spell with Bury because of a hamstring injury and departs Highbury having made over 200 appearances for the Cod Army.
"This is just a part of football and each club has a turnover of players," Alexander told the club's official website.
"All four are good lads and I'm sure they'll each find a club and continue their respective careers. Shaun, in particular, has been at the club a long time and enjoyed success. We genuinely wish them all the best."