Now, after 10 years of living with cancer, the 28-year-old's options have run out -- McLean has begun hospice and is preparing to die.
This is his final video:
My doctor says I won. He says I won. I got to believe him. There's nothing else I could have done. I fought to the end. I never said no. Every time we wanted to try a new experimental drug, I stood up to the plate. I swung my bat as hard as I could. Ballgame's over, guys. With that, I'm going to say "bye" for the very last time. I love you all.