The one-goal victory secured three vital points for the Baggies and edged them somewhat closer to Premier League safety, which their back line playing a huge part in securing a clean sheet.
There was also plenty of love for fellow experienced signing Darren Fletcher, who last week attracted criticism from some West Brom fans.
This week, however, Fletcher and Lescott were two of the Baggies' outstanding stars.
It was most certainly a team performance that outdid Southampton at the Hawthorns, though, and West Brom's season is now looking very positive indeed. How quickly things change but it is hardly a surprise considering Tony Pulis's track record.
Next up for the Midlands side is a double header against Aston Villa - both in the Premier League and FA Cup. What a week it promises to be for West Brom...
For now, though, fans can bask in the glory of beating a fifth-placed Southampton side thanks to Saido Berahino's goal - and a majestic defensive masterclass from Lescott. Here's how fans saw his display on Twitter!
Boing Boing! Some great performances today. Mozza, Gardner, Lescott and Fletcher were superb. Bring on the Villa! #wba— The Humdrum Express (@HumdrumExpress) February 28, 2015
Tremendous result for #WBA today. Bit of a stuck record but Lescott was immense again, only to be outshone by Fletcher. Nice to see Mulumbu— Chris (@wbaboy) February 28, 2015
Massive win and a massive effort from the lads. Fletcher, Gardner, Morrison & Lescott were my pick of what was a real team performance. #WBA— Ray Butler (@Raymondpbutler) February 28, 2015
@JoleonLescott. Another quality, towering performance Joleon.— Steve Forrester (@Steve_Fozz) February 28, 2015