If you’re an NBA 2K18 fan, you’re pumped for the addition of All-Time teams for each of the league’s 30 franchises.

What you may be disappointed by is your All-Time squad having some glaring omissions — no Charles Barkley on the 76ers? No Rasheed Wallace on the Pistons?

And then what about die-hards in Seattle who are desperate to play with a Supersonics team that actually wears yellow and green uniforms (you can play with Gary Payton, Sean Kemp and other Sonics as part of Oklahoma City, which is where the Sonics moved in 2008)?

There’s a good explanation for all of that. We spoke with a couple of people at 2K Sports, who answered both of those mysteries.

The gaming company has an agreement with the National Basketball Retired Players Association, which gives them the rights to use the likenesses of former players, but not all of them. Some players actually choose to opt out of the RPA agreement. Those who aren’t a part of it can sign a separate deal with 2K Sports if that want to be included in the game.

Barkley is the most famous example, partially because he’s said in the past that he has certain conditions he wants met. Here’s what he said in 2016 via SI.com:

“The reason I am not on 2K is because they would not give me money. They make a lot of money on that game. What I said to them was we as players have not done enough for the retired players association. We told the 2K people that our job is to take care of the older players. I don’t even want any money. I said, “Let’s come up with an amount of money for you to give to the retired players union.” They said, “Well we get all the guys the same.” And I said, “Well, we ain’t all the same.” I told them they make a gazillon dollars on that game. They said, ‘Well we are not going to do that [give money].’ So I’m not giving them the right to use my license until they come up with a fair number. I’m not trying to be a pig or greedy. They should donate the money to the retired players. If they would give a million dollars a year to retired players union, they can use my likeness.”

“Some players don’t want to do it because they have no interest in the gaming space for variety of philosophical reasons,” added Ronnie Singh, the digital marketing director for 2K Sports also known as @Ronnie2K. “We would honestly want everybody that we could have in the game to the best of our abilities.”

Singh mentioned that Caron Butler found out he wasn’t initially included on all-time Washington Wizards team. He reached out to Singh, who answered immediately, and now the company and the swingman are working on an agreement to get him into the game.

As for the Sonics? Because the NBA treats the Sonics as the Thunder franchise, 2K Sports’ agreement with the league prevents the game from using any team but the Thunder to represent that franchise.

Sorry, Seattle.