Albion suffered defeat against a 10-man Burnley side at the Tameside Stadium on Monday afternoon.
First-half goals from Lewis Richardson and Joel Mumbongo gave the hosts the advantage going in at the break.
Mumbongo doubled his tally less than 10 minutes into the second half and although Owen Windsor’s strike gave the Baggies encouragement, they couldn’t make their late pressure count.
The Clarets put pressure on from the off and made the most of it 20 minutes in when goalkeeper Ted Cann was forced into an error, which Richardson seized upon - curling an effort beyond the Baggies stopper.
And within the space of just a few minutes, the hosts doubled their advantage when a flowing attacking move culminated in Mumbongo striking a first-time finish past Cann from close range.
Burnley limited Albion to few opportunities in the first half, but Windsor tried to get his name on the score-sheet before the interval when good work down the left saw a ball floated over the Clarets defence and into the Baggies forward’s space.
However, Windsor’s acrobatic attempt couldn’t keep the ball under his spell as Deon Burton’s men went in trailing at the interval.
Similarly to the first 45, Burnley’s youngsters netted early into the second half when Ethan Ingram hesitated on a loose ball which allowed Mumbongo to latch onto the ball before rounding Cann to net his second and the Clarets’ third.
Nick Clayton-Phillips’ introduction off the bench made an impact on proceedings and the Baggies netted a response courtesy of his cross.
A looped ball from the left evaded everyone and found its way through to Windsor at the back post, who calmly brought it down before guiding a low finish beyond Burnley stopper Marc Richter.
The goal gave Albion confidence, with Finley Thorndike going close with a mazy run into the box, before Windsor’s great ball over the top into his path was intercepted by the onrushing Richter.
Substitute Zak Brown nearly put the hosts under pressure in the remaining minutes when a fine strike from the edge of the box looked destined for the top corner. But Richter matched it with a big save to claw it away.
However, the Burnley stopper was forced to play out the final minutes with one less defender after Jake Rooney’s poor challenge on Clayton-Phillips earned him a second yellow card and, unfortunately for the home side, a red.
But it didn’t affect the final outcome as the young Baggies suffered their sixth consecutive defeat.
Albion: Cann; Ingram, Williams, Shotton, Harmon; Gardner-Hickman (Clayton-Phillips 58), Solanke (Brown 75), Iroegbunam, Tulloch (Dyce 40); Thorndike; Windsor.
Substitutes: Boruc, Sharpe.
Red card: Rooney (Burnley).