Sure, James' numbers are likely going to decline the deeper into his 40s he plays. But at least at his point of entry, he is far and away the greatest 40-year-old basketball player of all time. And so, with apologies to urkle91, James isn't just defying the typical NBA age curve, he's completely shattering it.

Lakers superstar LeBron James has spent over two decades perfecting his craft and millions of dollars to preserve his body for the grind of an NBA season.

LeBron James celebrated his 40th birthday Monday, and he'll be making history once again. Assuming he suits up in the Lakers' next game versus the Cavs on Tuesday night, he will become the first player in NBA history to play both as a teenager and in his 40s.