How Roy Lee Jackson's Runs Allowed Per 9 Innings Compares to Similar Players
Roy Lee Jackson posted a career Runs Allowed Per 9 Innings of 4.19, near the relief pitcher average of 4.54 — a profile that tracked closely with league norms. His strongest Runs Allowed Per 9 Innings season came in 1979, posting 2.2, well below the relief pitcher average of 4.33 that year. The highest point came in 1978 at 9.24, well above the relief pitcher average of 4.21 that year. Production slipped through the final seasons. The figure moved from 4.19 in 1984 to 2.93 in 1985 and 4.47 in 1986. The decline marked the closing chapter of the career. Significant season-to-season variance characterizes the Runs Allowed Per 9 Innings profile — ranging from 2.2 to 9.24 — though the career average tracked near league norms.
Roy Lee Jackson Lifetime Runs Allowed Per 9 Innings
Stats similar to Runs Allowed Per 9 Innings for Roy Lee Jackson
| Roy Lee Jackson
Runs Allowed Per 9 Innings |
|---|
| Career | 4.19 |
| Season Avg. | 4.19 |
| 162 Game Avg. | 4.19 |
| More Info | See More |
Roy Lee Jackson Runs Allowed Per 9 Innings Per Season
Roy Lee Jackson's Runs Allowed Per 9 Innings 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.
Roy Lee Jackson Runs Allowed Per 9 Innings by Team
Roy Lee Jackson's career Runs Allowed Per 9 Innings totals broken down by each team he played for, ordered by when he first joined that team.
Roy Lee Jackson Runs Allowed Per 9 Innings Year-Over-Year Change
A waterfall chart tracking how Roy Lee Jackson's career Runs Allowed Per 9 Innings 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.
Roy Lee Jackson Runs Allowed Per 9 Innings Distribution vs. Comparable Players
Each box summarizes Roy Lee Jackson's seasonal Runs Allowed Per 9 Innings 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.
Roy Lee Jackson Runs Allowed Per 9 Innings — Season-by-Season Breakdown
Every season of Roy Lee Jackson's MLB career with Runs Allowed Per 9 Innings 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.
