Dumbarton have axed four players from their squad after missing out on promotion from Division Three. Manager Gerry McCabe has not offered a new contract to utility man John Dillon, who has been at Strathclyde Homes Stadium since 1999.
Midfielder John Paul McKeever, 19, has made only eight substitute appearances since arriving from Clyde.
Youngsters Gary McDevitt and Kevin McCann have only made one appearance each for the club.