That sounds correct from my reading. I suppose part of my confusion is that the Knicks training camp started a week ago afaik, so it seems late in the game to bring a guy in. I assume Boo's headed for a G league deal.
One of the things that stood out for me over the summer league games were just how many guys he was competing with were in their third or fourth season of summer league tryouts, or were 'much' older ex-starter/bench guys trying to get back on a team. So he was competing against a lot of experienced guys