It started during the 2006-2007 season when Kevin Garnett of the Celtics ate a couple of PB&J's before a game. He had a great game so from then on he demanded that there be 2 PB&J's there for him before every game. It didn't take long for it to spread to his Celtics teammates and then to the rest of the league. It's become so much of a cult thing that now players and coaches will go to battle if their PB&J's aren't in the locker room or even on the team plane: http://www.foxsports.com/nba/story/golden-state-warriors-peanut-butter-and-jelly-sandwiches-020116 What's your PB&J preference? Mine is: White bread Jif Creamy Smucker's Strawberry Preserves Once in a while I will mash up a banana and mix it with the peanut butter with a couple of drops of honey but not often. Sometimes I will toast the bread and sometimes I won't.