In NBA 2K18, there are a few ways to update your team’s roster. The first way is by using the “Roster Update” option in the game’s main menu. This will update your team’s players and coaches with new information and changes. The second way is by using the “Player Update” option in the game’s main menu. This will update your team’s players with new player data and changes. The third way is by using the “Coaching Update” option in the game’s main menu. This will update your team’s coaches with new information and changes. Finally, you can use the “Team Update” option in the game’s main menu to update all of your team’s players and coaches at once.