A couple quotes from this article that really stood out to me...
"You kept hearing rumblings all spring that [Iamaleava] one way or the other wouldn't be here in the fall," one Tennessee source told ESPN. "A lot of people were surprised he missed that practice, but it wasn't the first time he missed something he was supposed to be at, so I don't know if anybody should have really been that surprised."
And then there's this....
"I'm getting in the portal, if you need to handle your business," Iamaleava said as he was walking off the practice field, according to a Tennessee player who heard him say it.
One of the teammates went to Heupel to alert him. Heupel met with Iamaleava to make sure everything was OK and didn't mention anything about the information coming from teammates, and Iamaleava assured his coach that everything was good and it was "all a bunch of rumors."
and then the nail in the coffin on Nico....
"That next morning, Iamaleava didn't show up for Friday's practice or meetings and didn't alert anyone in the program.
Nic Iamaleava urged his son to go in and meet face-to-face with Heupel and his coaches to work things out, but Iamaleava felt betrayed, sources said, and did not speak with Heupel on Friday. Several people within the Vols' program tried to reach out to the quarterback to no avail."
So it was Nico, NOT Big Nic that decided to not show up to practice