Per Bill Simmons: Josh Kushner read about the Mark Walter stuff going on and decided to contact Walter directly about buying the Lakers. Adam Silver was not involved.
Simmons prefaced this by saying he has intel on how Iger and Kushner ended up buying the Lakers. Haven't seen this reported anywhere else.
(For what it's worth, I find that when Simmons says he has intel, it's reliable and accurate, even if it's about the Lakers)
Simmons also added the context that Vegas expansion team is going to cost over $9 billion, and Kushner/Iger didn't have highest bid + weren't sold on Vegas anyway needing to build a new stadium. So in the midst of Vegas seeming unlikely, Kushner happened to be reading about Walter's troubles and just decided to give him a call.
Some other interesting comments from the pod, which he did with Sam Koppelman (an investigative journalist who has collaborated with Pablo Torre):
- Simmons said "Kushner's really well respected for being a smart-ass dude."
- Also said: "Josh isn't gonna run the day-to-day at all. Iger's doing all of it. Iger's 75, can probably put 6 or 7 really good years in here. And this is all he's gonna do. This guy just ran a giant company."
- Koppelman called Kushner a "killer" and said, "It's pretty amazing that [Kushner's] laid low amid the Jared stuff and everything else, and has built this reputation as a great investor. I mean who knows, I haven't done an investigation into Kushner. Anything could happen. But I do think if you're looking for a sports team owner, there's way worse people than Josh Kushner. Josh Kushner and Iger - that's a serious, serious ownership group, and I think the Lakers are gonna be in decent hands."