Harrison has joined the Whites on a permanent basis after three season-long loan spells from Manchester City.
Will Harrison earn an England call-up this season?
It was Stateside where Harrison originally made his name, with him scoring 14 goals and providing 10 assists in 61 appearances for New York City FC.
But Harrison now has plenty of Premier League experience, having featured 37 times in the English top flight.
The 24-year-old has been capped by the England under-21s twice but former All Leeds TV anchorman Wainman feels Harrison could make the step up to the senior squad sooner rather than later.
He told TIF: “He has got better year after year. Going from the player Jack Harrison was to then being touted for an England call-up shows the trajectory even though I know there is a lot ahead of him.”