How Jack Aker's Win Percentage Compares to Similar Players

Jack Aker posted a career Win Percentage of 51.09, near the relief pitcher average of 49.61 — a profile that tracked closely with league norms. His best Win Percentage season came in 1966, posting 66.67, well above the relief pitcher average of 51.1 that year. The lowest point came in 1964 at .000, well below the relief pitcher average of 49.61 that year. Output was consistent through the final seasons. The figure moved from 50.0 in 1972 to 44.44 in 1973 and 50.0 in 1974. The consistent output characterized his final seasons. Significant season-to-season variance characterizes the Win Percentage profile — ranging from .000 to 66.67 — though the career average tracked near league norms.

Jack Aker Lifetime Win Percentage

Stats similar to Win Percentage for Jack Aker
Jack Aker
Win Percentage
Career51.09
Season Avg.51.09
162 Game Avg.51.09
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Jack Aker Win Percentage Per Season

Jack Aker's Win Percentage 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 Aker Win Percentage per season line chart

Jack Aker Win Percentage by Team

Jack Aker's career Win Percentage totals broken down by each team he played for, ordered by when he first joined that team.
Jack Aker career Win Percentage by team bar chart

Jack Aker Win Percentage Year-Over-Year Change

A waterfall chart tracking how Jack Aker's career Win Percentage 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 Aker Win Percentage year-over-year waterfall chart

Jack Aker Win Percentage Distribution vs. Comparable Players

Each box summarizes Jack Aker's seasonal Win Percentage 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 Aker Win Percentage distribution box chart versus comparable players

Jack Aker Win Percentage — Season-by-Season Breakdown

Every season of Jack Aker's MLB career with Win Percentage 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.
Jack Aker Win Percentage season-by-season breakdown table