Michael Stone is expected to miss at least six months with an ACL/MCL injury. Assuming all goes well, that would mean he returns towards the end of Arizona Coyotes' training camp. And even then, it's unlikely he would begin the season at 100%.
Yet Stone's injury may highlight how substantial Arizona's problem on defense is in a way that even the loss of Oliver Ekman-Larsson couldn't.
What is Michael Stone Worth?
It may not be totally fair, but saying Stone is a poor man's Keith Yandle is not entirely inaccurate:
Your outlook on Stone's value is likely related to your gut feelings about what it means to be good at defense.