Marcelo Bielsa's Whites were handed an early advantage via a comical Romaine Sawyers own goal, after which Gjanni Alioski, Jack Harrison, Rodrigo and Raphinha all bagged a goal apiece.
Graham Smyth, the YEP's chief football writer, hands out the scores.
7. Mateusz Klich
8 - Much better performance than his last two. Grew into the game nicely. Limped off with a knock just before the hour.
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8. Raphinha
9 - A livewire. Scored a wonderful goal, gave West Brom problems when he picked up the ball. Tried a few things that didn't come off. Sent in some great corners.
Photo by David Rogers/Getty Images.
9. Jack Harrison
8 - Looked dead on his feet after a difficult start, in which he struggled to contain Furlong, then recovered magnificently to score a fabulous goal. Put a few nice crosses in. Photo by DAVE ROGERS/POOL/AFP via Getty Images.
10. Rodrigo
9 - His movement was top notch, West Brom couldn't contain him. Popped up in numerous good positions, deserved his goal.
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11. Patrick Bamford
8 - Looked desperate to get on the scoresheet but kept working regardless. Played a lovely part in Harrison's goal. Missed a couple of chances.
Photo by TIM KEETON/POOL/AFP via Getty Images.
12. Jamie Shackleton
8 - Showed his passing, his energy and his skill. The touch to send Dallas away for Raphinha's goal was class.
Photo by Tim Keeton - Pool/Getty Images.