Mario wants to meet with his players to leave them with some dignity. No sense in burning bridges with his players, especially when some might be coming to Miami via the transfer portal.
Mario has an unimpeachable position and message to his players, 'this is the only job I would ever leave Oregon for, just as you love Oregon as your soon to be alma mater, so do I for my hometown alma mater, this chance comes around once in a lifetime if you are lucky, I have to take it, please understand I love you guys and this is the hardest decision I have ever had to make', simple!