How Jack Mercer's ERA Compares to Similar Players
Jack Mercer posted a career ERA of .000, well below the relief pitcher average of 3.96 — a mark that ranked among the best of his era. Across 1 season, the ERA arc showed a promising start, with limited data making longer-term conclusions premature. With 1 season of data, the ERA arc was above league norms — too limited for reliable trend analysis. Some season-to-season variance runs through the career line, but the career average remained well above league norms across 1 season.
Jack Mercer Lifetime ERA and Similar Stats
Stats similar to ERA for Jack Mercer
| Jack Mercer
ERA | Jack Mercer
Component ERA | Jack Mercer
Defense Independent ERA |
|---|
| Career | 0 | 4.48 | 7 |
| Season Avg. | 0 | 4.48 | 7 |
| 162 Game Avg. | 0 | 4.48 | 7 |
| More Info | See More | See More | See More |
Jack Mercer ERA Per Season
Jack Mercer's ERA for each season of his MLB career, plotted against that year's league average. Switch between comparisons — National League, Hall of Fame, RP, North America, or players born in the same country — to see how he stacked up year by year.
Jack Mercer ERA by Team
Jack Mercer's career ERA totals broken down by each team he played for, ordered by when he first joined that team.
Jack Mercer ERA Year-Over-Year Change
A waterfall chart tracking how Jack Mercer's career ERA shifted from season to season. Each bar represents the change added to his career total that year, making peak and decline phases easy to spot.
Jack Mercer ERA Distribution vs. Comparable Players
Each box summarizes Jack Mercer's seasonal ERA alongside a selected comparison group across all seasons he played. The box covers the middle 50% of seasons, the center line is the median, and the whiskers extend to the min and max. A tighter box means more consistency; a higher median means more output. Use the selector to switch comparison groups.
Jack Mercer ERA — Season-by-Season Breakdown
Every season of Jack Mercer's MLB career with ERA alongside league, Hall of Fame, positional, birth region, and country-of-birth averages for that year. Career totals include sum, average, min, max, and median.
Note: A dash (—) means no qualifying players existed in that comparison group for that season. Most commonly this happens for the Hall of Fame group.
