My freshman year of HS began a stretch of about 10 straight years or more that Elder beat La Salle and even before that, La Salle wins in the GCL were few and far between. La Salle is now on par with the other GCLS schools and quite a few — especially from Elder — have trouble coming to terms with that. So the story goes that La Salle must be doing something nefarious to have caught up. Losing to La Salle, a program Elder owned for decades, in five of seven years will do that.
Kudos to you for recognizing it.