How John Shaffer's ERA Compares to Similar Players
John Shaffer posted a career ERA of 4.57, above the relief pitcher average of 3.96 — a level that fell short of typical league production. Across 2 seasons, the ERA arc showed a disappointing start, with limited data making longer-term conclusions premature. With 2 seasons of data, the ERA arc was below league norms — too limited for reliable trend analysis. Significant season-to-season variance characterizes the ERA profile — ranging from 1.96 to 6.19 — though the career average fell below league norms.
John Shaffer Lifetime ERA and Similar Stats
Stats similar to ERA for John Shaffer
| John Shaffer
ERA | John Shaffer
Component ERA | John Shaffer
Defense Independent ERA |
|---|
| Career | 4.57 | 4.08 | 4.13 |
| Season Avg. | 4.57 | 4.08 | 4.13 |
| 162 Game Avg. | 4.57 | 4.08 | 4.13 |
| More Info | See More | See More | See More |
John Shaffer ERA Per Season
John Shaffer's ERA for each season of his MLB career, plotted against that year's league average. Switch between comparisons — American Association, Hall of Fame, RP, North America, or players born in the same country — to see how he stacked up year by year.
John Shaffer ERA by Team
John Shaffer's career ERA totals broken down by each team he played for, ordered by when he first joined that team.
John Shaffer ERA Year-Over-Year Change
A waterfall chart tracking how John Shaffer'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.
John Shaffer ERA Distribution vs. Comparable Players
Each box summarizes John Shaffer'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.
John Shaffer ERA — Season-by-Season Breakdown
Every season of John Shaffer'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.
