How Jack O'Connor's ERA Compares to Similar Players
Jack O'Connor posted a career ERA of 4.89, well above the relief pitcher average of 3.96 — production that significantly underperformed against league baselines. His strongest ERA season came in 1984, posting 1.93, well below the relief pitcher average of 3.6 that year. The highest point came in 1981 at 5.86, well above the relief pitcher average of 3.53 that year. Production slipped through the final seasons. The figure moved from 1.93 in 1984 to 4.94 in 1985 and 4.3 in 1987. The decline marked the closing chapter of the career. Significant season-to-season variance characterizes the ERA profile — ranging from 1.93 to 5.86 — though the career average remained well below league norms.
Jack O'Connor Lifetime ERA and Similar Stats
Stats similar to ERA for Jack O'Connor
| Jack O'Connor
ERA | Jack O'Connor
Component ERA | Jack O'Connor
Defense Independent ERA |
|---|
| Career | 4.89 | 5.02 | 4.93 |
| Season Avg. | 4.89 | 5.02 | 4.93 |
| 162 Game Avg. | 4.89 | 5.02 | 4.93 |
| More Info | See More | See More | See More |
Jack O'Connor ERA Per Season
Jack O'Connor's ERA for each season of his MLB career, plotted against that year's league average. Switch between comparisons — American League, Hall of Fame, RP, North America, or players born in the same country — to see how he stacked up year by year.
Jack O'Connor ERA by Team
Jack O'Connor's career ERA totals broken down by each team he played for, ordered by when he first joined that team.
Jack O'Connor ERA Year-Over-Year Change
A waterfall chart tracking how Jack O'Connor'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 O'Connor ERA Distribution vs. Comparable Players
Each box summarizes Jack O'Connor'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 O'Connor ERA — Season-by-Season Breakdown
Every season of Jack O'Connor'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.
