ALBION's PL2 side were undone by a stoppage time goal to lose 1-0 against Sheffield United under-23s in the Premier League Cup.
United had the first real opportunity of the game on 10 minutes when Tyler Smith's shot was pushed around the post by Brad House.
Albion then had a chance of their own in first half stoppage time as the ball fell to Nick Clayton-Phillips on the edge of the box, but his powerful drive was saved by Hugo Warhurst.
After the break it was much the same, with House again making a good save to keep out another effort from Smith.
Regan Slater then hit the bar for The Blades with just over quarter of an hour to go, and substitute Jamie Soule saw his header float inches wide for Albion not long after.
Four minutes into stoppage time United stole the win thanks to a long-range shot from Nathan Thomas that curled into the top corner.
ALBION: House, Melbourne, Martinez, Jameson, Soleman; Brown, Bradley (Wilding 60); Tulloch, Azaz (Soule 80), McCourt (Clayton-Phillips 45); Pierce.
Substitutes: Przybeck, Harmon.