At the age of 40+, only one player in MLB history has hit over 26 homers in a single season. A-Rod already has 23.
It's not like he steadily declined. He was out of the game for over a year and just picked up hitting homers like it was nothing.
He is having a historic season for his age.
It sounds crazy but could he still be juicing? Maybe he is a juicing addict like Tiger Woods was a sex addict.