Rosternomics
Craig Breslow

Craig Breslow

★ active

Born Aug 8, 1980 · New Haven, CT · age 45

A former MLB pitcher and Yale graduate turned Boston Red Sox chief baseball officer, hired to modernize the club's pitching development and analytics.

3 seasons with salary-era data across 1 stint. All figures are franchise-level outcomes during the tenure, not solely attributable to one executive.

Titles0
Pennants0
Playoffs1
Record192–181
Win %0.515
+4.8WAB — wins above budget57th/195 execs
+10.7Talent above budget — roster-construction alpha (talent your budget bought above expectation)50th/195 execs
2.36Acquisition leverage — playoff pts each bought win added, given the roster it joined (did you buy where wins matter?)6th/195 execs
-7.4WAR surplus (era-neutral, win-equiv)53rd/195 execs
-64Roster surplus $M113th/195 execs

How the roster was sourced

Share of gross-positive acquired fWAR by channel (vs. league average).

Build channels — net fWAR

Acquired minus surrendered / signed minus walked.

Home-grown (draft/intl)+7.3
Trade+2.3
Free agency-0.6
Rule 5 / minor draft-0.3
Sourcing mix: 26% draft · 38% FA · 36% trade · 0% R5

Tenure breakdown

TeamRoleYearsSzns WAB WAB/yr TAB WAR surp HG Trade FA R5 AcqLev W-L% POPenWS Surp $M
Red Sox POBO/GM 2024–present 2 +4.8 +2.42 +10.7 -7.4 +7.3 +2.3 -0.6 -0.3 2.36 0.515 1 -64
Career total (1985+ data) 3 +4.8 +10.7 -7.4 +7.3 +2.3 -0.6 -0.3 2.36 0.515 1 -64

Players acquired — 44 players, by realized fWAR for the franchise (scroll for more)

PlayerPosTeam How Year fWAR
Garrett Crochet P BOS Trade 2024 +6.1
Alex Bregman 3B BOS Free agency 2025 +3.5
Aroldis Chapman P BOS Free agency 2024 +3.4
Carlos Narváez C BOS Trade 2024 +3.2
Roman Anthony DH/OF BOS Draft 2025 +3.0
Lucas Giolito P BOS Free agency 2024 +2.0
Willson Contreras C BOS Trade 2025 +1.7
Connelly Early P BOS Draft 2025 +1.3
Ranger Suarez P BOS Free agency 2026 +1.3
Hunter Dobbins P BOS Draft 2025 +1.0
Justin Wilson P BOS Free agency 2024 +1.0
Marcelo Mayer 2B/3B BOS Draft 2025 +0.7
Payton Tolle P BOS Draft 2025 +0.6
Cam Booser P BOS Draft 2024 +0.3
Nate Eaton 3B/OF BOS Free agency 2024 +0.3
Luis Guerrero P BOS Draft 2024 +0.3
Nick Sogard 2B/3B BOS Draft 2024 +0.3
Isiah Kiner-Falefa SS BOS Free agency 2026 +0.2
Nick Burdi P BOS Free agency 2025 +0.1
Eduardo Rivera P BOS Draft 2026 +0.1
Tyler Samaniego P BOS Trade 2025 +0.1
Chase Shugart P BOS Draft 2024 +0.1
Naoyuki Uwasawa P BOS Trade 2024 +0.1
Jack Anderson P BOS Draft 2026 +0.0
Jake Bennett P BOS Draft 2026 +0.0
Alec Gamboa P BOS Draft 2026 +0.0
Jhostynxon Garcia OF BOS Draft 2025 -0.0
Liam Hendriks P BOS Free agency 2024 -0.0
Jovani Morán P BOS Trade 2024 -0.0
Zach Penrod P BOS Draft 2024 -0.0
Dominic Smith 1B/OF BOS Free agency 2024 -0.0
Danny Coulombe P BOS Free agency 2026 -0.1
Caleb Durbin 3B BOS Trade 2026 -0.1
Johan Oviedo P BOS Trade 2025 -0.1
Robert Stock P BOS Free agency 2025 -0.1
Tyler Uberstine P BOS Draft 2026 -0.1
Ryan Watson P BOS Trade 2025 -0.1
Jamie Westbrook 2B BOS Rule 5 2024 -0.1
Kristian Campbell 2B BOS Draft 2025 -0.2
Mickey Gasper C/DH BOS Draft 2024 -0.2
Andruw Monasterio 2B/3B BOS Trade 2026 -0.3
Isaiah Campbell P BOS Free agency 2024 -0.4
Bailey Horn P BOS Trade 2024 -0.5
Abraham Toro 2B/3B BOS Free agency 2025 -0.7

WAB = wins above what the team's payroll predicted (resource-controlled). WAR surplus = era-neutral value (WAR minus payroll in win-equivalents). Roster surplus $M = dollar value of WAR over cost. Build channels (realized fWAR): HG = home-grown via amateur draft / international signing; Trade = acquired minus surrendered (incl. purchases/waivers); FA = signed minus walked; R5 = Rule-5 / minor-league-draft pickups. Credit follows the acquisition year — home-grown to the regime at the player's draft/signing (not whoever was in the chair when he peaked), trade/FA/R5 to the GM who made the move. Players acquired as prospects before debuting (e.g. Smoltz, Bagwell; Rule-5 picks like Uggla) are counted as trade/R5, not home-grown. All are franchise-level outcomes during the stint, not solely attributable to one executive.