Up and until Aaron Judge took 3rd place on the single season home runs list, the top 3 were Barry Bonds (73 in 2001), Mark McGwire (70 in 1998) and Roger Maris (61 in 1961).
What single pitcher faced all three of these big hitters over his career?
So Maris played until 1969, and Bonds/McGwire started in 1986. So I'd have to GUESS it was someone like Nolan Ryan (insane career, insane stats) or Steve (?) Carlton. The other two I think could qualify are Phil Niekro (yes, a knuckleballer) or Sutton.