I had not seen this before:
Reds staff ERA+ was in top 10 in baseball history.

Last year’s NL Central winners had an offense that was, especially with Joey Votto out, just okay, but the pitching staff was, by at least one measure, one of the best in baseball history. It wasn’t instantly apparent, because the Great American Ball Park does so much to disguise their greatness, but consider ERA+, which accounts for league and park factors: