Knicks' Mills explains why team had to act quickly to trade Kristaps Porzingis'We felt the 7th was really important because if we let this go beyond the 7th, the leverage completely shifted'2/3/2019, 6:59 PMNew York Knicks president Phil Jackson, left, and general manager Steve Mills answer questions during a news conference at the team's training facility, Friday, July 8, 2016, in Greenburgh, N.Y. (AP Photo/Julie Jacobson) / Julie Jacobson/AP