Midfielder heads out on loan
Young midfielder Billy Knott, 20, has joined Sky Bet League Two side Wycombe Wanderers on a youth loan.
Knott made his senior debut for the Black Cats as a substitute on the final day of last season and has featured regularly for the club's development squad.
His switch to Adams Park is his third loan move following spells with Woking last season making 22 Appearances scoring 10 goals and AFC Wimbledon during the 2011-12 campaign.