Gus Poyet hopes Sunderland will soon be in a position to flood their ranks with home-grown talent, rather than recruits.
Huddersfield defender Murray Wallace has signed a new contract that will keep him at the club until the summer of 2017.
Hearts have confirmed winger Andrew Driver has left the club to join MLS side Houston Dynamo.
Driver, who becomes the latest first-team player to leave Tynecastle, will join the Dynamo on loan until his Hearts deal expires in the summer.
A statement on the club website read: "The club wishes Andrew all the best as he continues his career with this fantastic opportunity to play in America."