Middlesbrough have signed Central Coast Mariners winger Sam Silvera and ex-Melbourne keeper Tom Glover on three-year deals and Manchester City forward Morgan Rogers on a four-year deal.
Former Spurs keeper Glover, 25, played 106 games for the Victorian club.
Rogers, 20, ended last season on loan in the Championship with Blackpool.
Boro have not said if they have paid a fee for the England Under-20 international.
Find all the latest football transfers on our dedicated page.