Who has the most home runs in a single season?

Who has the most home runs in a single season?
Here’s the company he now keeps — i.e., the all-time single-season home run leaderboard:

Barry Bonds, 2001: 73.
Mark McGwire, 1998: 70.
Sammy Sosa, 1998: 66.
Mark McGwire, 1999: 65.
Sammy Sosa, 2001: 64.
Sammy Sosa, 1999: 63.
Roger Maris, 1961: 61.
Babe Ruth, 1927; Aaron Judge, 2022: 60.

Here’s the company he now keeps — i.e., the all-time single-season home run leaderboard:
  • Barry Bonds, 2001: 73.
  • Mark McGwire, 1998: 70.
  • Sammy Sosa, 1998: 66.
  • Mark McGwire, 1999: 65.
  • Sammy Sosa, 2001: 64.
  • Sammy Sosa, 1999: 63.
  • Roger Maris, 1961: 61.
  • Babe Ruth, 1927; Aaron Judge, 2022: 60.