https://www.cnet.com/news/nba-smart-jersey-lets-you-change-team-allegiance-in-seconds/

At an All-Star Technology Summit showcasing how the league might change over the coming 19 years, Silver used a phone app to change the name and number from Stephen Curry's 30 to an old-school Michael Jordan 23.

He couldn't change the color (so you won't be able to instantly blend in with any team) and didn't actually explain how it works, but it's pretty cool nonetheless.