[yarddog]

I read somewhere than no one came close to Ruth in home runs per times at bat.

[Carriage Hill]

I hit a grand slam once in Little League, but that was it.

[freedumb2003]

Google is your friend:

https://en.wikipedia.org/wiki/At_bats_per_home_run

>> Mark McGwire possesses the MLB record for this statistic with a career ratio of 10.61 at bats per home run and Babe Ruth is second, with 11.76 at bats per home run. <<

Now, the Babe probably has the most unchemically-assisted.

Just sayn’

[be-baw]

Mark McGwire was first all-time in HR/AB, Ruth was second.

It would not be unreasonable to say McGwire shouldn’t qualify, because he was juiced up.