As a player, your number carriers a special meaning. It's what some casual fans know you by and it gets put on everything you get from the team from warm-ups to shorts to your sticks. When you get traded or sign with a new team, there's a chance that your number is not available. You have two options: buy the number off of your teammate or pick a new number and start a new era. An important decision, you typically only get one chance at.