Something has just dawned on me, through all the Celtics rebuilding issues, perhaps the person whom it most benefitted, was Marcus Smart.
Phase I: Rajon Rondo; picking his brain on passing techniques and steals would have been invaluable.
Phase II: Isaiah Thomas; getting to the basket through contact.
Phase III: Kyrie Irving; understanding backboard angles.
Phase IV: Kemba Walker; leadership & off ball movement.
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Picking up knowledge from these all-star caliber point guards must have been invaluable to his development, and made him the player he is today.