The Bluebirds have now lost four games in a row, with this defeat coming quick on the heals of Blackburn's 5-1 thumping last weekend.
Following Tuesday's defeat, both sets of supporters chanted "You're getting dismissed in the morning" at Cardiff manager Mick McCarthy. McCarthy told BBC Sport Wales, "I've got no issues about the fans at all." "They come here to cheer us on, to watch us perform, and to anticipate greater results, so I understand their frustrations."
"Whether we'll go back to the same form we were in last year, I don't know," the former Republic of Ireland manager added, "but we'll have to try." We need a result, and we need it now, because confidence is starting to wane, making things difficult for everyone."
Meanwhile, Valerien Ismael, the Baggies' manager, was overjoyed with the victory. "I'd want to express my gratitude to the players for their efforts and the three points," he remarked. "We're getting closer to my ideal for this team now." I want us to maintain our confidence and progress in the correct direction."
In the fifth minute, Karlan Grant scored with a fantastic strike from the edge of the area. The Baggies' second goal came as a result of a string of Cardiff errors, which culminated in Curtis Nelson sending the ball into his own net. West Brom moved a point ahead of Bournemouth, who are away to Peterborough on Wednesday, at the top of English football's second tier, after Alex Mowatt made it 3-0 in the 75th minute with a sweetly struck half-volley from outside the box. Substitute Matt Phillips completed the scoring eight minutes from time as West Brom moved a point ahead of Bournemouth, who are away to Peterborough on Wednesday.
Ben Brereton Diaz of Blackburn scored two goals against Huddersfield to follow up his hat-trick against Cardiff, but the Terriers still triumphed 3-2. Brereton Diaz equalized after Alex Vallejo had put Huddersfield ahead, and then scored from the penalty spot after Danny Ward had put Huddersfield back in front to conclude a sequence of three goals in eight minutes.
Ward had the final word, scoring the winner for Huddersfield Town in the final six minutes of the game. When Nick Powell's header gave Stoke a sixth-minute lead against Preston, it looked like they may break into the top two, but Ben Whiteman earned a 1-1 draw for the hosts. Queens Park Rangers won Birmingham 2-0 because to Ilias Chair's goals either side of halftime, while Middlesbrough beat Sheffield United 2-0 thanks to Duncan Watmore and Paddy McNair's goals in the first half.
In other matches, 10-man Hull drew 1-1 with Blackpool to earn a vital point. The visitors took the lead in the 42nd minute when Shayne Lavery scored, and Blackpool's chances of winning looked to have strengthened when Lewie Coyle was sent off with 10 minutes remaining, only for Tom Eaves to equalize.