Manager records and decision value explained

What did a manager do, and what would a different choice have been worth? Scouting Reports brings recorded management history and available decision estimates into the same workspace as player analysis. Search a person, choose a managing year, and check the team, competition and regular-season or postseason scope. A person’s playing and managing years are separate selections.

Compare the incumbent with other manager seasons. Start with comparable decisions and coverage, then examine the reference policy, missing evidence and sensitivity to assumptions. A case may favor retention, replacement or no clear separation. A historical comparison does not predict the wins a candidate would add to your club.

Open Pennant Run, then choose Scouting Reports →

Recorded results and tendencies

Assigned games, team records, substitutions and deployment describe what happened. Team wins also reflect players, opponents, front-office decisions, staff and variation in outcomes.

Modeled decision value

A supported estimate compares the expected result of an observed choice with a declared reference policy, using a specified information set and assumptions about later decisions. Read its unit: a run-valued estimate is not automatically a win-valued estimate. Each component shows its covered opportunities and limits.

Hiring evidence

To estimate the benefit of a replacement, a method must show that differences persist in future seasons and transfer to the destination team. Historical records and candidate decision models alone do not establish that. Employment availability, willingness and transition costs require separate evidence.

These research candidates are not total manager WAR. Do not add their values to player WAR, treat overlapping components as independent, or interpret unavailable components as zero. A one-run record or wins above a Pythagorean expectation does not isolate a manager’s contribution.

Retained historical manager/team/game tables span 1897–2025. That span does not establish complete play-by-play or decision analysis for every game. Each selected report identifies its observed games, team stints, decision coverage and sources. Current-season appointment evidence, where supported, identifies a title holder rather than proving every in-game assignment.

Retrosheet records game-level managers, including known substitutes and absences. A manager without a major-league playing record can still have a management report. Assignment evidence does not by itself identify who called every steal, bunt or substitution.

A sensitivity envelope shows how an estimate changes under the tested assumptions. It is not a confidence interval or a probability that the true value lies inside it. Missing health, readiness or available-alternative evidence can limit a decision comparison even when the game result is known.

When citing a result, include the manager, role, team, season, competition, phase, component and unit, covered opportunities, reference policy and reported range type. Keep the source and method with the claim. Workspace share links preserve selections; this page explains their interpretation and publishes no working comparison state.

• Retrosheet manager documentation: game-level assignment and known substitute managers. The information used here was obtained free of charge from and is copyrighted by Retrosheet. Interested parties may contact Retrosheet at www.retrosheet.org.
• Chadwick Baseball Bureau Register: person identity links, distinct from evidence that a person played or managed in a particular season.
• Bukiet, Harold and Palacios (1997), A Markov Chain Approach to Baseball: a modeling foundation for evaluating batting orders.
• Peeters, Salaga and Juravich (2020), Matching and Winning?: research on manager and organizational match effects, relevant to the limits of comparisons across teams.

These sources motivate the analysis; they do not independently validate Pennant Run’s estimates. Exact release and method details accompany the selected Scouting Report. Explore the broader methodology and source attribution.