Darren Rovell shows off one his favorite Knicks memorabilia items, which includes notorious Menendez brothers

Collecting sports memorabilia can sometimes breed some very interesting results.

One minute, you're looking over a seemingly very mundane trading card in your hand, and the next minute you see a couple of convicted murderers sitting court side in the background.

That's exactly what happened with a 1990-91 NBA Hoops card featuring former New York Knicks point guard and, later, Golden State Warriors head coach Mark Jackson.

A SPORTING GOODS GIANT IS GETTING INTO THE LUCRATIVE,...