AL-89 · Selected Studies — Sport Management

Payroll Efficiency Classroom

Moneyball for the masses. This pedagogical tool teaches the pay-vs-performance framework at the heart of modern baseball analytics: $/fWAR efficiency (cost per Win Above Replacement). Learn what WAR measures, why payroll efficiency varies dramatically across teams, and use embedded 2024 team data to find who's overpaying, who's underpaying, and why. Ends with a budget-constrained "GM for a Day" exercise. Complements the live tools at mlbtb.com (Questrom/BU research).

📊 Data: Spotrac 2024 payroll; FanGraphs 2024 fWAR (approximate team totals); methodology informed by Valentin & Williams research program at BU Questrom
🔒All inputs are processed locally in your browser. Nothing is transmitted, stored, or logged. Inputs disappear when you close the tab.
What Is WAR? — Five Core Concepts
1Replacement Level▶
A replacement player is freely available — the guy on the waiver wire, the Triple-A callup who costs the league minimum. WAR measures how many more wins your player provides compared to that freely available alternative. A player worth 0.0 WAR can be replaced for free without hurting your team. A player worth 3.0 WAR gave your team 3 more wins than a replacement would have.

The "replacement level" baseline is set at approximately the 20th percentile of all MLB players — the level of performance you'd expect from freely available talent. This is why WAR is a relative, not absolute, measure.
2Counting Stats vs. Rate Stats vs. WAR▶
Batting average tells you how often a player gets a hit — but it ignores walks, extra-base hits, stolen bases, and defense. RBIs depend heavily on how many runners were on base before the player batted — a circumstance the player doesn't fully control.

WAR integrates everything: hitting runs above average (wRC+), fielding runs above average (UZR or DRS), baserunning runs above average, positional adjustments, and a park factor correction. It converts all contributions into a single number denominated in wins. One WAR = one additional team win over a replacement-level player in a full season.
3Position Scarcity Adjustments▶
A shortstop who bats .270 is more valuable than a left fielder who bats .270. Why? Because shortstops, catchers, and center fielders provide defensive value that first basemen and left fielders typically cannot. Finding a shortstop who can hit is harder than finding a left fielder who can hit — the skill is scarcer.

WAR adjusts for this through positional run values. Shortstops receive a +7.5 run positional adjustment; left fielders receive -7.5 runs. This means the same offensive output is worth more WAR at a premium defensive position. The most valuable players in WAR terms are often excellent defensive players at premium positions.
4Negative WAR Is Real▶
A player with negative WAR is, by definition, worse than a freely available replacement. They are costing your team wins just by being on the roster. This happens: aging veterans on long contracts, injured players playing through pain, and players placed in positions poorly matched to their skills all risk negative WAR seasons.

The uncomfortable implication: paying $20M/year for a player posting -0.5 WAR is not just inefficient — it's actively harmful relative to giving their roster spot to a league-minimum player. Teams managing salary cap constraints must weigh whether carrying expensive negative-WAR players is worth the cap cost.
5WAR Scale — Reference Points▶
Below 0Below replacement level — should be replaced 0.0 – 1.0Replacement-level player; freely available 1.0 – 2.0Role player; useful roster filler 2.0 – 3.0Solid starter; above average 3.0 – 4.0Good player; everyday starter quality 4.0 – 5.0All-Star caliber season 5.0 – 6.0All-Star to MVP candidate 6.0 +MVP-caliber season 14.1Babe Ruth, 1923 — the highest single-season fWAR recorded
Shohei Ohtani's 2023 season: 10.0 fWAR. Mike Trout's 2012 season: 10.9 fWAR. These are historically exceptional seasons that illustrate why both players command $30M–$70M annual salaries.
Self-Check Quiz
1. A player produces 0.5 fWAR. According to WAR theory, what should a team do?
Sign them to a long-term contract — consistency is valuable
Consider replacing them with a freely available player — they're barely above replacement
Trade them for prospects — 0.5 WAR players have great trade value
2. Why does a shortstop who bats .270 have more WAR than a left fielder who bats .270?
Shortstops face harder pitching because they bat earlier in the lineup
Shortstops play more games per season on average
WAR applies a positive positional adjustment to premium defensive positions — finding a shortstop who can hit is scarcer
3. What does "replacement level" mean in the WAR framework?
The level of play expected from a newly drafted player
The performance of a player traded from a rival team
The level of performance freely available through waiver claims, AAA callups, or minor league free agents — the baseline you can always reach for free
The $/fWAR Framework
$/WAR = Annual Salary ÷ fWAR Produced
Market rate 2024: ~$9M/WAR (FanGraphs estimate). A "fair value" player at $9M/WAR. Below = efficiency surplus. Above = inefficiency.
Why this matters: A player who earns $40M and produces 5 WAR costs $8M/win — near market rate, reasonable contract. A player who earns $40M and produces 2 WAR costs $20M/win — badly inefficient. The Dodgers' ability to sign Shohei Ohtani to a heavily deferred $70M/year contract while he produces 8–10 WAR represents ~$7M/win — exceptional value even at that salary level.
Pre-arb advantage: Players in their first 3 MLB service years are controlled at near-minimum salary ($740K in 2024). A pre-arb player producing 4 WAR at $740K costs $185K/win — essentially free value. This is why teams like Tampa Bay, Cleveland, and Baltimore compete well despite low payrolls: they build rosters around pre-arb talent and sell players at peak value before they hit free agency.
2024 MLB Team Payroll Efficiency — All 25 Teams

Sorted by $/WAR (best to worst). Payroll in $M. fWAR approximate. Market rate = $9M/WAR.

$/WAR Efficiency — Visual Ranking

Bar length = $/WAR. Green <$6M, amber $6–10M, red >$10M. Dashed line = $9M market rate.

Team Report Card — Reading Efficiency
Winners on a Budget
The most efficient teams in 2024 — Baltimore Orioles, Cleveland Guardians, Tampa Bay Rays, Milwaukee Brewers — all share a common model: aggressively develop pre-arb talent, leverage player development to generate WAR cheaply, and sell players at peak value before they reach free agency. Baltimore's ~$95M payroll generated 36+ fWAR in 2024 at under $3M/WAR. This is the "Moneyball" model applied systematically — not just smart drafting, but a coherent organizational philosophy around player control and efficiency.
Spending Correctly
The Los Angeles Dodgers ($276M payroll, ~48 fWAR) demonstrate that high payroll + high performance = still-reasonable efficiency. At approximately $5.8M/WAR, the Dodgers are actually below market rate despite the largest payroll in baseball. How? Shohei Ohtani at ~$46M deferred-heavy salary producing 9+ WAR, Mookie Betts producing 6+ WAR, and a system that turns average players into above-average contributors. High payroll is justified when it generates proportionally high wins.
Overpaying
The Mets ($313M payroll, ~28 fWAR) and Colorado Rockies ($135M, ~10 fWAR) illustrate how high payroll does not guarantee efficiency. The Rockies' extreme case — over $13M/WAR — reflects a combination of expensive long-term contracts for declining players, the Coors Field effect on player valuation, and organizational dysfunction. The Mets accumulated expensive player commitments that did not deliver proportional performance in 2024. The Chicago White Sox situation (~$103M payroll, 6.8 fWAR, ~$15M/WAR) reflects a different problem: a rebuilding team paying veterans who are not performing.
Discussion Questions
  • Why does player development quality matter more than payroll in the WAR efficiency framework?
  • The Dodgers have the highest payroll AND strong efficiency. What does this tell us about the interaction between market size and organizational competence?
  • Is a low $/WAR always good? What are the risks of a roster built entirely on cheap pre-arb players?
  • How does the luxury tax in MLB change the payroll efficiency calculus for teams like the Mets and Yankees?
  • What does the Rays' consistent efficiency, year over year with different rosters, suggest about organizational systems vs. individual talent acquisition?
GM for a Day — Budget Exercise

Assemble a roster within budget. Target: beat the MLB average $/WAR. Pre-arb talent is limited to 3 slots.

$50M$300M
Total Salary
$0M
Remaining Budget
—
Total WAR
0.0
$/WAR
—
vs. Market Rate
—
Pre-Arb Slots Used
0 / 3