Welcome to Moments of Greatness, a series where athletes look back on moments in their lives when they saw true greatness, on or off the field, and discuss why those moments were so impactful to them. Next up is Boston Celtics guard Isaiah Thomas.***Growing up, my favorite player had to be Allen Iverson. He was a little guy who changed the way we play the game of basketball. Pound for pound, the best guy to ever touch a basketball.I remember the 2001 NBA Finals, Game 1, him stepping over Tyronn Lue.That was the definition of Allen Iverson.He did it his way.