Sometimes you don't win with the players who brought you to the brink, and that's sports.
The Boston Celtics decided that trading Marcus Smart — their longest-tenured member, a driver on five trips to the Eastern Conference finals and the only guard this century to win Defensive Player of the Year — for Kristaps Porziu0146u0123is, a tantalizing 7-foot-3 talent, gives them a better shot at the NBA championship, and that's the business of sports. There's a difference, and the crux of this deal lies in the space between.
There are reasons on paper this trade makes sense for the Celtics.