Albion's youngsters dramatically beat Sunderland 2-1 at their Training Ground HQ on Monday afternoon, nabbing a late winner to secure all three Premier League 2 points.
Richard Beale's side came from a goal down as strikes from Akeel Higgins and Archie Kirton earned them the spoils against the Black Cats.
The hosts' first chances came via Donte German-Ranger and Akeel Higgins, who both saw finishes well-saved.
The visitors also worked a golden opportunity to take the lead, but struck the woodwork after capitalising on a slip from Deago Nelson.
Around the 30 minute mark Michael Parker nearly handed his side the lead, but his powerful drive deflected inches wide of the post.
Ben Cisse was there to deny the Black Cats from long range on three occasions, too, as neither side managed to break the deadlock ahead of the whistle.
Albion started the brighter of the sides in the second period, and almost opened the scoring through Souleyman Mandey, only for his strike to fly just over the bar from 20 yards.
However, it was Sunderland who would find the back of the net on the 55th minute. A corner into the Baggies box went uncleared and the visitors managed to bundle the ball home.
Harry Whitwell soon had a free-kick stopped by the goalkeeper, while Higgins was desperately unlucky to see his brilliant strike come off the underside of the bar and away.
Albion did eventually get the reward their hard work deserved when Whitwell played in Parker, and Higgins fired home his cross on the volley.
The visitors attempted an immediate response, shooting off the far post having countered sharply as the entertaining game entered its final 10 minutes. Sunderland continued to push, and Parker quickly turned from provider to saviour - putting in a crucial block to deny them a sure goal at close range.
The Baggies caught their opponents cold during stoppage time, though, thanks to substitute Archie Kirton. The winger raced in and took a touch before slotting home, sparking jubilant celebrations.
That result leaves Albion 17th in the Premier League 2 table with 21 points. Next, they switch their focus to the PL Cup against Cardiff City on Friday evening.
Albion: Cisse, Nelson, Diomande (Onyemachi 77), Mohammed, Parker, Hall (c), Mandey (Iddrisa 56), Whitwell, Williams (Kirton 90+1), Higgins, German-Ranger (Humphries 45).
Substitutes: Wallis (GK).
Catch the WBA TV footage from the game below!
