Jalen's worked his tail off since he's been here, and it's time for him to move on. He's hurt, been hurt, playing hurt (even had an MRI today), and it's just time to go.
Butch made many promises to Jalen including running more of an I-formation (remember what they did in the entire Outback Bowl last year) to convince him to stay, and then Butch never ran it one time this year. Jalen knew he didn't fit this system, and wanted to go find a better fit last year, but he believed what the staff said to him so he stayed.
He's taken a beating, and wants to have a long career in the NFL one day. He will no longer play RB and is considering a change to WR/TE. He is not going to the NFL right now nor does he want to. He's going to go to another offense and develop at the position first.
He spent time with about 20 of his closest teammates tonight at the team meeting and told them what he had decided. Most knew anyway. Pretty sure he broke down as this has been hard on him.
Most Vol fans will never know the pain that he has played through and endured the past 2 years because most only care about W's, but in the end, I hope a few do actually remember his contributions the past couple of years.