How Mike Armstrong's ERA Compares to Similar Players
Mike Armstrong posted a career ERA of 4.1, near the relief pitcher average of 3.96 — a profile that tracked closely with league norms. His strongest ERA season came in 1985, posting 3.07, well below the relief pitcher average of 3.9 that year. The highest point came in 1986 at 9.35, well above the relief pitcher average of 3.77 that year. Production slipped through the final seasons. The figure moved from 3.07 in 1985 to 9.35 in 1986 and 8.68 in 1987. The decline marked the closing chapter of the career. Significant season-to-season variance characterizes the ERA profile — ranging from 3.07 to 9.35 — though the career average tracked near league norms.
Mike Armstrong Lifetime ERA and Similar Stats
Stats similar to ERA for Mike Armstrong
| Mike Armstrong
ERA | Mike Armstrong
Component ERA | Mike Armstrong
Defense Independent ERA |
|---|
| Career | 4.1 | 3.85 | 4.74 |
| Season Avg. | 4.1 | 3.85 | 4.74 |
| 162 Game Avg. | 4.1 | 3.85 | 4.74 |
| More Info | See More | See More | See More |
Mike Armstrong ERA Per Season
Mike Armstrong'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.
Mike Armstrong ERA by Team
Mike Armstrong's career ERA totals broken down by each team he played for, ordered by when he first joined that team.
Mike Armstrong ERA Year-Over-Year Change
A waterfall chart tracking how Mike Armstrong'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.
Mike Armstrong ERA Distribution vs. Comparable Players
Each box summarizes Mike Armstrong'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.
Mike Armstrong ERA — Season-by-Season Breakdown
Every season of Mike Armstrong'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.
