Short answer, yes.

Longer answer from the help section (Overview of Eras):

Or, to use a modern example, a pitcher from a DH-league typically allows an extra run every two games compared with a pitcher who does not have to face a DH. If you want to see what would happen if this pitcher was traded to a non-DH league, or you wanted to release all of the players from both leagues and draft new rosters, you need a way to make sure the DH-league pitcher is not unfairly punished.

DMB uses eras to adjust for these factors. In DMB:

  • A .280 hitter in 1968 (when the league batting average was under .250) is a better hitter than someone who hit .280 in 1930 (when the average player batted .300).

  • A shortstop making 40 errors in 1912 is a better fielder than a shortstop making 30 errors in 1993.

  • A starting pitcher completing 30% of his games in 1984 is more durable (relative to his peers) than someone who completed 50% of his starts in 1920.

  • A DH-league pitcher with a 3.30 earned-run average is a better pitcher than someone with a 3.00 ERA in a non-DH league.