GUIDE · Lineup regularity
Lineup regularity
A 0–1 score describing how consistently a hitter appears in the starting lineup. Where the hit streak tells you "how hot is he right now?", regularity answers "how likely is he even in the lineup tomorrow?"
Formula
regularity = (games played ÷ 20) × min(1, 40 ÷ calendar span days)
- Games played: plate-appearance or batter-record games within the 20-game window.
- Calendar span: days between the first and last game in that window.
- Multiplying the two folds in both how often he starts and how tight the schedule was.
How to read the score
- 0.70+: effective everyday starter.
- 0.50 – 0.70: semi-regular; sits against certain matchups.
- 0.30 – 0.50: platoon / rotation role.
- below 0.30: bench / backup usage.
Regularity says nothing about skill — it only reports lineup frequency. Pair it with hit streak and multi-hit trends to read both usage and performance.
Why include schedule density?
A "16 of 20 games played" player looks the same on paper whether those 20 games spanned 25 days or 55 days. Injury management and fatigue differ in each case, so we fold schedule density in directly.
Related
- How hit streaks are counted.
- 20-cell hit dial at the top of every team page.