Albion were knocked out of the Birmingham Senior Cup losing 4-1 to Leamington on a rainy night at The Phillips 66 Community Stadium.
Leamington grabbed the opener just after the half hour mark as Jack Edwards hit a low right-footed shot from the edge of the box past Ben Pierce in the Albion net.
The hosts doubled their lead just before the break through Colby Bishop, who latched on to a knock down from a free-kick and tucked away with ease.
The third for Leamington came within the hour, and it was a second for Edwards as the ball bounced around the Baggies box and found the Leamington number 8 who fired home from close-range.
However, the Baggies did get themselves on the scoresheet, as substitute Alex Gilbert was first to a low cross and side-footed into the corner of the goal.
But any hopes of an Albion comeback were stifled shortly after as Bishop was brought down by Pierce in the box to win Leamington a penalty - which he scored for his second of the game.
ALBION: Pierce, White (Asomugha 45), Taylor, Healy, Melbourne, Delaney, Wilding, Ashton, Clayton-Phillips (Gilbert 73), Morton (King 85), Trialist.
Substitutions: House, Hill