This could be authentic, but it’s hard to tell because of the incompleteness and the fading. In my opinion, George Foreman has a pretty cool and unique autograph. He makes a boxing glove out of either the first “G” or out of the entire word “George”. He then typically puts the first letter of his last name “F” right in the middle part of the last name. It all makes for an interesting autograph, somewhat befitting of his personality.
His autographs are not too expensive probably because he has signed a lot. Therefore, I’d consider getting another one that’s more boldly signed. I used to have a signed children’s book by him. Pretty sweet autograph.