I think these injuries sort of do go back to the fact that the guys never really had a chance to properly wind down/heal up after the season shut down because of the long discussions about the NBA bubble being a thing. So instead of the guys giving their respective leg injuries a chance to really get back to normal you had guys probably doing more physical activity than they would in a normal offseason while still not being in great enough shape to withstand the physical stress of the physical re-conditioning process (this has been a huge part of the players’ arguments in the current NFL labor kerfuffle as well).
In the case of Marvin, one does have to wonder if his foot was ever properly healed in the first place given how he was just on the verge of participating in practice again riiiiiight when COVID-19 shut down the season. (We also get to the nasty subdiscussion about whether or not the current Kings medical/training staff is as qualified/good as the old one that got fired by Matina was).
EDIT: Never mind, it was his other foot... which is good, I guess?