You can read about Mo towards the bottom of the link about Khyiris Tonga.
If he keeps losing, there's a chance he will no longer be BYU's biggest player. I think he is listed as 385, which means he weighed more than what was listed on the roster last year.
The D-line needs help. Could big Mo help the team this year or is he still a project a year or two away from seeing playing time? He certainly looks the part of a football player.