Mowbray's boys smash Saints
Sunderland stunned Southampton with a five-star show – as 16-year-old sensation Chris Rigg announced himself on the Championship stage.
The youngster rounded off a 5-0 rout for the Black Cats in stoppage time with a goal on his league debut. Jack Clarke had opened the scoring in the opening minute with Pierre Ekwah grabbing a double and Bradley Dack registering his first for the club.
Boss Tony Mowbray said: “I'm happy with the day and happy for the fans. On paper this is a really difficult game.
“I looked at their squad on the back of the programme and just saw name after name after name of really experienced high-quality footballers.”
Meanwhile, Preston North End are top of the table thanks to a 2-0 win over Stoke City and Ipswich Town are second after coming from two goals down to beat Cardiff City 3-2.
Exeter City lead the way in League One following a 1-0 win over Burton Albion and League Two new boys Notts County are at the summit after beating Accrington 3-1.
For exclusive stories and all the detailed EFL news you need, subscribe to The Football League Paper website, digital edition, or newspaper from as little as 14p a day.