There's a story behind the small black triangle forever imprinted on Kevin Durant's wrist. Like the rest of his tattoos -- "Maryland" (his home state) across his shoulder blades, a portrait of Tupac on his leg -- the ink is an attempt to grab hold of a moment in time and mark it as meaningful.

The triangle tattoo is a symbol of the friendship between Durant, his business partner Rich Kleiman and their friend Charlie Bell. A few years ago the three men were hanging out, talking about the incredible possibilities in front of them, and someone thought it sounded like a good idea to get tattoos commemorating the bromance.

It feels a bit quaint now, even to them. Aww, friendship tattoos. How cute!

"I wouldn't get most of the tattoos I have now," Durant says with a smile. "But that's why they're cool. I got each of them at a point in my life I was feeling something I wanted to remember."

Kleiman laughs and points to a Chinese character tattooed on his arm.

"Like, this means 'patience,' " the 41-year-old executive says. "Could you imagine if I went in somewhere now and was like, 'Yeah, what up, my man? Could you give me the Chinese symbol for patience?'

"The guy would be like, 'OK, midlife crisis. What up, Dad?' But when I was 19, in Miami, I'm like, 'Yooo, give me "patience"!' "

We're sitting at a shady table at the cafe atop the Montage Hotel in Beverly Hills. The Warriors have the day off after a win over the Lakers, and Durant and Kleiman are making the most of it. There was a morning meeting with Brat (a company that created a network for young YouTube stars), this lunch interview, house hunting in Beverly Hills in the afternoon, then a red-eye flight to Washington, D.C., to attend the opening of College Track, which prepares high school students to apply to and graduate from college, at the Durant Center in Prince George's County, Maryland.

Life as a two-time NBA Finals MVP and budding entrepreneur can be a little like taking a speedboat down the chocolate river in Charlie and the Chocolate Factory -- sensory and experiential overload around every turn.

"My platform is hoops," Durant says. "Billions of people are watching, so why not leverage it to do the cool stuff that we like to do?"

As one of the best basketball players on the planet, Durant can meet anyone he thinks is interesting, invest in any company he digs and get into any event he wants. Twitter and Square CEO Jack Dorsey? He flew in for Durant's birthday party this year. Apple VP Eddy Cue? A huge Warriors fan whose company just greenlighted a scripted show called Swagger based on Durant's experiences in AAU basketball. David Geffen, Oprah, Diane von Furstenberg? Durant hung out with them at Google's invite-only celebrity camp at the Verdura Resort in Sicily the past few summers.

His world is wide open -- and so the challenge for Durant and other superstar athletes-turned-business moguls isn't just in finding the time to take advantage of the exclusive opportunities in front of them but in searching for the right reasons to do so.

A great brand is a lot like a great jump shot: The best ones appear effortless. And yet, underneath the surface, years of sweat, grind and refinement have gone into it. Athletes used to wait until they were done playing to start building their businesses off the court. They'd let their teams or agents with dozens of other clients handle their marketing. Even back then, they knew they were leaving money and leverage on the table. But who had the bandwidth to build out a portfolio while playing?

The Boardroom | Episodes Episode 1: Sneakers Episode 2: Team Ownership Episode 3: Social Media Episode 4: Player Development Episode 5: Athletes and their Brands Part I Episode 6: Athletes and their Brands Part II

In the business world, that's called a market gap. Customers want a product that doesn't exist yet? Somebody should go create that product.

In this case, first a superstar athlete such as Durant had to believe he was capable of building his own brand while playing. Then he had to figure out how to do it.

Earlier in his career, Durant says, he mostly just wanted to do what he saw other superstars do.

"'Gatorade, I need that. McDonald's,' " he says. "I need a trading card, Upper Deck, because I've seen other great players do that."

"You also thought your off-days had to be completely filled," Kleiman says from across the table.

Over the six years they've been working together, Kleiman's job has been to help Durant be purposeful and intentional about his projects and to take advantage of the creative freedom Durant's considerable platform has afforded him.

That filtering process can be dizzying for a curious soul like Durant, who readily admits he's still searching -- and probably always will be -- for what he wants to be. So a few years ago, in one of their daily deep dives, Kleiman laid it out: "You need to understand that this part of your life should be enjoyable."

Durant had spent too long trying to fit the model of what he thought a superstar athlete "should" be doing. Just do what feels right or fun or interesting, Kleiman told him. Maybe one of his investments will turn into the next Vitamin Water or Beats by Dre. Maybe it'll just be a cool experience to look back on. Maybe it'll flop. But if a startup company presents a product Durant or Kleiman would use himself, or its founder had a certain je ne sais quoi they both connect to, that's what guides them.

Take Postmates. "I'm hungry one day," Durant says. "And Rich was like, 'Yeah, [this company will] bring you food from any restaurant.' I'm like, 'They've got an app like that? Can you call somebody up there? We need to get involved, because we use this s--- on a day-to-day basis.' " Soon after, in June 2016, Durant and his team bought a stake in the company, which reportedly had grown tenfold by a valuation this January.

There's a more rigorous evaluation process after that initial spark, of course. Durant says he likes to study the industry and how a company has grown from its early stages of development before he invests. But if there's a guiding principle behind the extensive portfolio they've assembled, it is to follow and trust Durant's curiosity.

So far they've invested in some 50 companies, ranging from the cold-pressed juice company WTRMLN WTR to an autonomous drone company called Skydio. There's an equity partnership in the headphone company Master & Dynamic. And starting Feb. 11, there's The Boardroom, a six-episode series on ESPN+ and multiplatform media brand in which Durant, Kleiman and ESPN college basketball analyst Jay Williams talk with players, industry executives and insiders from the worlds of sports, business, media and technology about how the culture around sports is changing.

"Me and Rich always had these times where it was just him and I, brainstorming," Durant says.

So why not turn those conversations into a show?

"It's like Sports Business Journal but for fans," Kleiman says. By now he's got this pitch down cold.

"I was watching sports last year, and there was a headline about an investment that Kevin had made. Then a headline about a Liverpool investment that LeBron had made. Then some Yankees highlights.

"When I was 14 years old, I would have been so confused about why the investment stuff is in the middle of these highlights. But in our world now, that's way cooler than the other stuff."

There's no job description that can capture what Kleiman does for Durant. He's his business partner in Thirty Five Ventures, the umbrella corporation for their production company, Thirty Five Media; the Kevin Durant Foundation; and all of their investments, endorsements and business partnerships. He's the first or second person Durant speaks to every morning, depending on how early Durant's brother, Tony, and baby nephew FaceTime him. He's definitely the first person Durant calls if anything ever goes wrong.

It's more than your typical manager-athlete relationship: By all accounts, this is a genuine friendship. They refer to each other as "my best friend" and sometimes even "brother." When ESPN shot the photos for this story, Durant preferred to share the stage with Kleiman and Williams. Yes, some of that is because they're promoting The Boardroom together. But it's also a reflection of just how close he and Kleiman are.

At first glance, it's an unlikely pairing. Kleiman grew up in New York City, attending a private high school that was a member of the Ivy League Preparatory School League. Durant grew up in an impoverished area outside of DC, often taking public transportation for several hours a day to get to and from one of the three high schools he attended.

Kleiman is boisterous, excitable and intense. He has a ton of friends, sleeps with his phone on, spends hours every day workshopping ideas at home in what he calls his think tank. Durant is sensitive, creative and thoughtful. He has just a few close friends from his youth (he was too busy with basketball), spends his off-days exploring restaurants in San Francisco or record stores in Berkeley, and talks wistfully about driving his 1969 Volkswagen bus to Mexico for surf trips.

Durant had already worked with two other agents before he started working with Kleiman in 2013. But they quickly found a professional and personal synergy.

"We just met at, like, the perfect point," Durant says of the former music industry manager he has empowered to run his business empire. "We both hit our peaks at the same time."