Tennessee linebacker Darrin Kirkland, Jr. is going the grad transfer route and leaving Tennessee. He was originally committed to Michigan in the 2015 class before signing with the Volunteers. He had 111 tackles, 11.5 tackles for loss, 4 sacks, and 1 interception in 2015 and 2016 combined, but he missed 2017 with an injury. He was committed to the Brady Hoke regime, so I'm not sure whether the current staff has any interest, but I thought it was noteworthy, anyway.
UPDATE: So now it seems as if he's not transferring.