Robbie McDaid has been released by Leeds United.
The Tottenham Hotspur striker says he will look after the Manchester United teenager while the pair are on England duty.
Gary Megson signed the West Ham United star for Sheffield Wednesday four years ago.
Rangers face Hibernian in the Scottish Cup final.
The former Chelsea midfielder has missed NYCFC's opening 12 games of the campaign after suffering a calf strain during preseason.
The departing Ajax boss also has kind words for Daley Blind of Manchester United.
Ibrox side Rangers want to sign Burnley midfielder Joey Barton in the summer transfer window.
Martin O'Neill, Roy Keane and Paul Lambert got his vote.
Tottenham Hotspur midfielder Mousa Dembele and Chelsea star Eden Hazard are Belgium international teammates.
Ibrox side Rangers and Hibernian will face each other in the final of the Scottish Cup on Saturday.