NBA free agency didn't just open on Tuesday — it detonated. In a span of days, the Eastern Conference has been surgically dismantled and reassembled. Giannis Antetokounmpo is headed to South Beach to pair with Bam Adebayo. Kawhi Leonard is running it back with the Toronto Raptors, seven years after delivering them a title and immediately leaving. LaMelo Ball got shipped to Minnesota. And then there's LeBron James — the league's all-time leading scorer...