Manchester United have released six players after deciding to disband one of the club's reserve sides.
Tierney played in a Carling Cup match last year
Next season the club will have one reserve side and one youth team and boss Six Alex Ferguson conceded there were limited chances for the players.
Defender Paul Tierney is the only one of the sextet to have had first-team experience, although Ramon Calliste has been a regular for Wales Under-21.
Ben Collett, David Poole, Lee Lawrence and Steven Hogg have also been freed.
Ferguson added he would be making more use of the loan system to help blood young players at Old Trafford.
Chris Eagles is currently at Watford, while Kieran Richardson has been turning in impressive performances during West Brom's relegation fight.
"Next season, with only one reserve team, we are going to farm more players out," said Ferguson.
"I think loans will be good for them to get league experience."