Unveiling Baseball’s Untouchable Pitcher: The Secret Behind the Lowest ERA Ever Recorded

So let’s celebrate the statistic that has stood the test of time by looking at the best regular season and career ERAs of all time.

Everyone in our rankings has worked at least 73.0 innings over the course of the season.

Lowest ERA in a Single Season (All Time)

1. Tim Keefe, Troy Trojans (0.86 ERA in 1880)

Keefe only made 12 appearances in 1880, but the right-hander completed them all and ended up pitching 105.0 innings in the Trojans’ 83-game season. Despite his efforts, Keefe, who was named to the baseball Hall of Fame, only managed a 6-6 record and Troy finished fourth in the National League at 41-42. Say what you want about eras, but Keefe remains the only qualifying pitcher with a sub-1.00 ERA.

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