As we all know numbers are of significance in guessing the mole. And so far two numbers really stood out for me, Four (4) and Seven (7).
Mole = 4 Letters
Mark = 4 Letters
Celebrity Mole No. = 4
Number of TV Related Personalities = 4
Number of Sports Related Personalities = 4
Journal Number:::: 4!
DOB: Sept = 7
(Rashad's Hat # in the Bucks for Clucks game) = 7
In "Painting Game" the 20K Painting to be retrieved had a Flag - no. = 7
Number of total CMY Episodes for the season = 7
8 players minus 1 mole = 7
Journal Number:::: 7!
Then again, I could be totally off!