I watched that second clip first, and definitely thought he was speaking slower and more slurred than he used to. He seemed not so bad in the other clip though.
He'll become a trainer later on following Roach's disease... err... tradition. Freddie advised him to retire though while he's healthy. He's talking from experience.
He's certainly 'not himself'. He's definitely got a cold or something but he also sounds slower and slightly slurred compared with pre-fight. Hopefully it's temporary and he makes a full recovery.