Paul Pierce said transition defense ist he core of the Celtics' problems after losing to the Philadelphia 76ers, 106-100. Filmed by Jared Weiss for CLNS Radio.<br /><br />-~-~~-~~~-~~-~-<br />Please watch: "FULL KYRIE IRVING and GORDON HAYWARD CELTICS Press Conference" <br />https://www.youtube.com/watch?v=f7FoDj4-Nzw<br />-~-~~-~~~-~~-~-
