The Celta Vigo loanee is returning to Spain at the end of the season.
The Greek hero is not looking wanted in America.
The Welsh international has impressed at Oakwell.
The former Manchester City boss has been linked with the Everton job.
Aston Villa, Blackpool, Charlton Athletic and Newcastle United were all relegated this season.
McAllister was a key recruit before a season filled with silverware at Anfield at the turn of the Millennium.
Everton are still trying to replace Roberto Martinez.
Tottenham midfielder Eric Dier said the game against Chelsea will help them long term.
David Unsworth won 3-0 when he took charge of Everton's last match of the season against Norwich City.
The former Chelsea boss is set to take charge at Manchester United.