Kyrie Irving was interested in playing in Brooklyn well before the the season ended.  According to Nets guard Spencer Dinwiddie, he talked to Irving about signing with the Nets back in December of last season.

Irving was obviously fed up with how things were going in Boston ahead of the Celtics failed playoff run and was already planning his exit.

That might explain why things ended the way they did last season.  Irving had one foot out the door for much of the season.

Flip the Page to Listen to Dinwiddie talk with Shams Charania about Irving: