The youngster received a chance to impress for the first team over the weekend against Burnley and grabbed the opportunity.
Asked about Scarlett being able to take the next step to becoming a regular first team player, Postecoglou stated to reporters: Like all the young guys, it is just about making an impact when you get opportunities and trying to build a body of work which allows them to progress their careers.
Dane's had a frustrating year. His loan move didn't work out and he's had limited opportunities in the first-team, but he is there, he's in the squad at the moment and he got some minutes the other day.
He had a couple of good moments and might get opportunities in the last two games. It is like any young player, you've got to take the opportunities put before you and make an impact to grow your career."