Baggies beaten by StokeALBION's under-18 side missed the chance to move clear of local rivals Wolves in the table after they were beaten 1-0 by Stoke City.
In a tight game at Albion's training ground, the visitors took the lead just before half time.
Despite applying pressure in the second period, the Baggies were unable to find an equaliser.
Jamie Smith's side stay on 8 points and face Middlesbrough this weekend.
ALBION: House, Meredith, Artymatas, Piggott, Dool, Chambers, Bradley, Morrison, Walker (Forss 60), Holsgrove (Harmon 80), Pierce.
Subs: Pryzbek, McCourt, Hall.