Jaylen Brown signs supermax extension; Blank check worthy players; New-look Luka

Ahead on NBA Today:Jaylen Brown signed the largest contract in NBA history! Our panel will dive into what this deal means for the Celtics and superstars around the league...And the NBA world reacts to soccer phenom Kylian Mbappe's massive contract offer. Which all-time NBA player is worth a one-year one billion dollar deal?Plus, Tim MacMahon joins to discuss Luka and the Mavs...   Learn more about your ad choices. Visit megaphone.fm/adchoices