“I've been thinking about the record since I reached the fifty plateau....” — Mark McGwire Quote

“I've been thinking about the record since I reached the fifty plateau. But you think about it and then you let it go because you can't waste many brain cells on hours thinking about it.”

“I touched Roger's bat and held it to my heart. My bat will lie next to his. I'm damn proud of that.”

“The steroids I did were on a very, very low dosage. I didn't want to take a lot of that. I didn't want to look like Arnold Schwartzenegger or Lou Ferrigno.”

“I've put all the hours in and there's a depth to my education. There are a couple of brain cells in there, more than you might expect of a 6ft 1in ginger skinhead.”

“I only get punched in the face for money. I don't wear big gloves. I don't go sparring. I'm saving my brain cells for my children. I put on MMA gloves and I throw for location. I throw for distance.”

“Throughout our lifetimes, we are constantly regenerating new brain cells in the hippocampus, a process called neurogenesis. New stem cells are constantly being born in the hippocampus that ultimately differentiate into fully functional neurons.”