WMG: The LeBrons

LeBron James has a time machine.
Taking a break from NBA, he builds a time machine in his spare time and time travels with it to meet his past and future selves. He takes these selves with them, gives them nicknames, and welcomes them to the present day.

LeBron James cloned himself.
Because of his Small Name, Big Ego, he builds a cloner that has an aging device and uses it to clone himself in four different ages.