Did Screech steal Slater's dirty underwear?

I found this photograph of what appears to be A.C. Slater's soiled underwear which were swiped from his locker at Bayside after wrestling practice.  Slater must have eaten at Taco Bell and ripped several wet farts, as his underwear looks really dirty!  I bet that Screech rubbed this dirty skidmark-encrusted underwear on his face while rubbing one out!