Maturity turns out to be a pretty potent competitive advantage. Just ask Derek Fisher of the Lakers who, even at the age of 35, has been a game-changer during the team’s playoff run. And he’s not alone. The average age of a player on the Celtics is 29 and on the Lakers, the average age is 28. And even the kids are pretty deep on experience. The youngest player on either team is Andrew Bynum; though he is 22, he has spent a full five seasons in the NBA.