Spurs reasoning:

If the spurs fall out of the top 4 draft spots and miss out on topic they decided to draft a better defensive player like Cody Williams. Cody might still be a raw prospect but alngoside wemby and garland I believe he could thrive Thats is why they take the risk and pull of a blockbuster move to bring in garland.

Cavs:

The Cavs new found star Donovan Mitchell has been in a lot of rumours recently whether if it is him getting traded or him leaving in free agency his future with the Cavs is uncertain so they panic and trade a disappponting garland away for mikal bridges and get Dennis who could play their starting point guard.

Nets:

The nets are facing a lot of problems. They traded their draft picks to bring in harden and it looked could until he left for Philly and they got back ben simmions. They are stuck in a place where they scant contend or rebuild. Their center Nic claxton is likely to leave and join Memphis this free agency so they should look to rebuild instead if retooling Thats is why they get young star keldom Johnson and valuable frps