The context of how "mental things" was being used in this thread seemed to imply that Dante wasn't understanding or grasping the NBA game. I don't think that's necessarily true. I just think Quin and DL are pushing him harder than others.
You really read into that then because here is the original quote where someone attributed it to a "mental issue".
Huh. DL wants Exum to have more urgency. So, it sounds like a mental issue. Weird. Who was it that said the Jazz were worried about Exum mentally? Weird.