His name is Haralabos Voulgaris, he makes millions every year betting on basketball, and he might be the most knowledgeable basketball watcher in the world.
Voulgaris spends 80 hours every week during basketball season chasing after every possible bit of information in the basketball world, and has been doing this for over a decade. According to Business Insider, he has spent millions of dollars and hired a number of employees to be able to chart very specific details of every single game, such as the distance the responsible defender is from the shooter on every single shot, and then to plug this data into a complex simulation he has built to be able to suss out in great detail the affects of each individual player on team performance. The thought of a private citizen spending millions just to learn more about basketball may seem ridiculous, but this knowledge has paid off for him in a big way.
But don't let his complex charting and simulations fool you into thinking he's just a math/numbers guy. Bob (as many people know him) has probably watched more Basketball in the last ten years than any other person on the planet. Says Bob: "I watch about 400 games from beginning to end [per season]. I watch at least one or two quarters of maybe 85-90% of games. I may just watch every defensive possession or every offensive possession or just watch particular lineups or matchups." He's not just passively watching either, he's always looking for the effects of certain strategies and certain aspects of the performance of specific players. His betting decisions are informed as much by this more traditional knowledge as they are by his simulations.
I realize this effort is mostly futile. Bob is too much of an outsider to get serious consideration for this job at this time. He did take a break from his betting to work in a front office a few years ago, but quit after a year because of the enormous decrease in salary and the higher-ups failing to grasp his revolutionary approach. My hope by posting this is that more people catch on to what he is doing, and the people who make GM hiring decisions eventually realize what a gigantic asset he could be to an organization.