These are some players who had the most home runs. (since your question was about as specific as 'Who led off?')
In September of 2011, Adrian Beltre (TEX) led the majors with 12 home runs. In the same month, his teammate Ian Kinsler held second with 11 home runs. These totals were more than anyone had hit in a single month in 2011, except for in May, when Jay Bruce (CIN) had 12, and Jose Bautista (TOR) had 11.
Barry Bonds consciously knew he was cheating by "doing steroids"... had Hank Aaron done them, he would have had no reason to think of himself as a cheater, as steroids were new and legal back then. Although Bonds does have the record, he KNEW at the time he had an unfair advantage, while Aaron on the other hand, let's leave it as.. had a "fair advantage" props to both men though..
What trolling moron asks about Baseball under Boats and Boating?
This year,
Nelson Cruz with 40.....!!
By season or career....?
I'm not sure