Striker Jordan Burrow, midfielder Ben Watkiss and defender Matthew Needham have all been offered six-month deals after impressing manager John Sheridan.
youth team manager Dave Bentley said: "Promotion into League One means that the standard that has to be achieved by our scholars is even higher but these three lads have the chance to catch the manager's eye and earn a long-term contract.
"We wish them well as we do those being released."
Source: PA
Source: PA