Very interesting and well researched. I was not aware that so many of Aaron's HR's came at home in '73. You are also on target about his youth being spent in the 2nd "dead ball era" I remember "The Year of the Pitcher" 1968 nobody was hitting that year. This would help explain why Aaron was better after the mound was lowered, etc, in his later years.
Two more examples of HOF players who were "good when they were old", what about Carlton Fisk, HOF catcher, he had 37 HR at age 37 while playing for the White Sox, and his youth was spent in Boston with the short left field wall, where presumably he should have hit more HR. And he didn't start his career until the 2nd dead ball era was over.
Or Willie Stargell who won the NL MVP at age 39, in 1979.
That being said, I am very suspicious about players today who are good into their late 30's and 40's, and that includes certain pitchers. In Canseco's book he said one indication a pitcher was on the juice was when he became better at an age when pitchers historically were washed up.
Getting back to A-Rod, I think it's funny that the Yankees have this high and mighty attitude, like how dare he turn their offer down, doesnt' he know that being a Yankee is the essence of greatness, etc. Hank Steinbrenner has come across as being rather arrogant, he needs to get some public relations advice.