Edit: FWIW, I'd really like to get Atlanta's weather data for 1973, wind and temperature. I can't help you with what you want.... but check this out.... 1.) Over 200 Hrs were hit in Fulton --- the next closest was 164 in the Stick. 2.) ATL pitchers pitching at home gave up 87 HRs, the next closest, the Phillies at 80, after that the Cubs at 72. 3.) ATL's pitchers Home ERA, 4.75 -- Phillies are next at 4.18, followed by the Cubs at 3.88 Aaron, Evans and Johnson were not the only dudes hitting HRs in Fulton in 1973. Lots of HRs were hit in Fulton in 1973 Even among Hall of Famers he's unique. Just as Babe Ruth is. Just as Ty Cobb is. Just as Ted Williams is. Just as Rickey Henderson's SBs are. Agreed... At some point you have to concede that great players will be great sometimes... or maybe Tigers Stadium was just a HR launching pad. It certainly was for LH hitters like Evans. Short Porch Out of these 3 sluggers that all have over 500 homeruns none of them had seasons over 30 HRs after the age of 35. False -- Frank Robinson had 30 when he was 37. Also, McCovey had 29 at 35, and 28 at 39 -- Mays had 28 at 39 -- Killebrew had 28 at 35.... so your selection of 30 HRs as a benchmark seems arbitrary. Furthermore, McCovey and Mays were not full-time players at 39 yrs., had they been, they would have exceeded 30 HRs. Please find me another player in the history of baseball who had their highest HR total or highest HR/PA percentage with at least 35 HR's after their age 35 season? What does this prove? -- I'd have a hard time finding another player that won 11 batting titles like Ty Cobb did as well... Aaron/Cobb/etc.. great players, even among the elites. I think if Aaron used steroids in 1971 and 1973, he would have used them in the gap years as well -- and we would not see big drops.