In honor of LeBron's 40th birthday, we're picking the best men's basketball players at every age from the NBA to college to high school.

On May 25, 2015, as LeBron James was tearing through the Eastern Conference on his way to what was then his fifth consecutive trip to the NBA Finals, Twitter user urkle91 issued one of the most infamous basketball-related proclamations in the site's history.

With LeBron James turning 40 this week, here's a look at some statistical milestones for players in their 40s in NBA history.

NBA superstar LeBron James celebrates his 40th birthday on Monday, the milestone carrying him to yet another first in a league in which he has starred for more than two decades -- with the clock still running.

LeBron James turned 40 years old on Monday, and his birthday's given him a chance to reflect on his nearly 22-year NBA career. When asked if he ever expected to still be competing in the NBA when he was 40,

That is the day that LeBron James was born. That means that today (Monday, December 30) is when James has turned 40 years old. It’s always impressive when a professional athlete reaches that age and is still playing as it doesn’t happen often.