Dejected Wolves manager Mick McCarthy apologised to his club's supporters after the against Black Country rivals West Brom.
Wolves hit back to level at 1-1 despite being outplayed, but the Baggies romped to victory in the second half.
"The saddest part is that we capitulated, which I have never seen my team do - not really," McCarthy said.
"That's not us. I have never apologised for a performance but would do for that as I know what it means to everybody."
Peter Odemwingie did most of the damage with a hat-trick, but the game was still delicately poised at 1-1 with just under 30 minutes remaining.
However the hosts fell apart in the latter stages to increase the pressure on McCarthy, whose side have slipped into the Premier League relegation zone on goal difference after a run of just one win in 11 matches.
McCarthy added: "We got back into the game having been outplayed in the first half and we started the second half really well
"But we failed to deal with two corner kicks and end up 3-1 down. We were beaten by the better side in the end.
"It could have been 2-2 but we have to make it 2-2. There were lots of chances at the start of the second half. We were the better side and I didn't see that coming.
"It was a poor performance so it's apologies all round to our fans."
Baggies boss Roy Hodgson, whose side have moved eight points clear of the bottom three, backed his counterpart.
He said: "I think Wolves will stay up if they keep their heads because they have an outstanding manager and an outstanding owner as well.
"I feel sympathy and empathy for Mick because we're both experienced coaches. At the risk of sounding arrogant, I think Wolves can be more than satisfied with what Mick has done for the club.
"I think he's done an excellent job and continues to do an excellent job. I'm always saddened that those jobs don't always get recognised.
"On the other hand I don't want to appear naive. I know it's part of the game nowadays and it doesn't matter whether you're God Almighty or Mick McCarthy, people are going to think there's people out there who can do it better.
"People should be careful what they wish for."