Who has the lowest career earned run average (ERA)?

Earned runs are the devil to pitchers. An earned run means you pitched poorly and the other team scored a run based on your pitching. Errors aren't counted, so it's all on you. So, who had the lowest career earned run average?

First place for lowest career earned run average goes to Ed Walsh who finished with a 1.82 earned run average

Second place for lowest career earned run average goes to Addie Joss who finished with a 1.89 earned run average.

Third place for lowest career earned run average goes to Three Finger Brown who finished with a 2.06 earned run average.