Verified Answer :

FadeFox530

Well, it really depends on who you believe, because i have a lot of friends who say it is Purple Guy, but i have others that say you just play as an unknown character. So, i would go with Purple Guy, but I'm only like 85 percent sure.

MuseFan

It is debatable, but many theories state that Mike Schmidt is the character you play as. But the theory hasn't been debunked or solved yet. :D