Manolo Gabbiadini's 72nd-minute victor - four minutes after the Italian striker had come on as a substitute - pushed Swansea towards the Premier League trapdoor and confirmed West Brom's relegation.
But what are the permutations in the final week of the season?
11 - The number of points Moore has won in his five Premier League games in charge, compared to eight in 18 matches under Alan Pardew and 10 from 12 under Tony Pulis. Problems off the pitch added to the disappointment on it when a mid-season trip to Barcelona made the headlines for the wrong reasons.
Since Moore's appointment, West Brom have taken 11 points from a possible 15 to keep alive the hope of a great escape.
Meanwhile, a trip to Barcelona organised to boost morale ended with senior professionals Gareth Barry, Jonny Evans, Jake Livermore and Boaz Myhill having to apologise after a taxi was stolen from outside a fast-food restaurant in the early hours of the morning.
West Brom caretaker manager Darren Moore poses with the staff members after receiving the award.
Southampton refused to comment on the incident, although their official Twitter account has now posted a quite brilliant tweet.
The defeat leaves Swansea three points adrift of Huddersfield, who play their game in hand at Chelsea tonight.
A win for either the Swans or Southampton would see them needing just a point from their final two games, while if it finishes a draw at the Liberty, Huddersfield will require two.
Due to the goal difference it could all but seal Swansea's fate. However, it's unlikely they will come close to that feat, and while they should be able to down an already-relegated Potters side their goal difference will ultimately come to haunt them, and they will drop down to the Championship next season.