Future Hall of Fame tight end Rob Gronkowski attended a card collectors event and was asking plenty of questions about the worth of some NFL collector cards, in addition to his own.
The Patriots legend began asking about the differences in price between Tom Brady's card, Travis Kelce's card and his own card that were on display at the event. The card collector said that Brady's card, which included a piece of his game-worn jersey and was signed, was worth upwards of $15,000.
