[bogtog]

The NBA has a cap on how much each player can make (around $50M this year). Lebron could be, say, worth $100M/yr, yet they can't be paid this. I'm guessing that there are around a dozen players in the league worth more than the max salary.

[leksak]

$50M is not underpaid for any profession, that sounds like a sizeable salary regardless of what you do or the sacrifices you have to make.

[catlover76]

It's "underpaid" in the sense of like, if teams would pay him more in the absence of the salary cap, which the other posters kindly reminded me of, then his "true" salary is higher than his current.