2026 Season · KC Roster
Fenway Park, Boston, MA — opened 1912 · 37,755 seats. 9× champions · last 2018.
Every MLB player the encyclopedia attributes to the Boston Red Sox from profile season records, grouped by position, first season to last. Coverage follows the encyclopedia’s per-era source depth.
MLB players who spent their entire encyclopedia-attributed career with the Boston Red Sox — ranked by seasons of service. Tenure is the span the corpus attributes.
MLB players who wore the Boston Red Sox crest along the way but played for three or more franchises in all — the well-traveled careers this club was one chapter of. The count is distinct canonical franchises.
Every position room Boston Red Sox has passed down, steadiest first. The C room is their most stable — 9 holders across 106 years, a new one every 8.6 on average.
Four franchise-defining careers: VAL weighted by attributed tenure share, with a bounded bump for verified Hall of Fame and recorded award evidence.
557 player-season slots overlap another club's recorded span and are credited to neither (17.2% of considered span evidence).
Monument Timeline — who held it, season by season
1901–2026 · 2 handoffs
The holder in a season is the player with the most accumulated era-adjusted value (VAL) across attributed franchise seasons through that year — whole seasons only, never a depth-chart claim. A claim needs 3+ attributed seasons; unsettled through 1902. Relocated eras carry forward with the franchise.
Most prominent 8 of 950 shown · all 950 P →
Most prominent 8 of 189 shown · all 189 C →
Most prominent 8 of 118 shown · all 118 1B →
Most prominent 8 of 139 shown · all 139 2B →
Most prominent 8 of 108 shown · all 108 3B →
Most prominent 8 of 126 shown · all 126 SS →
Most prominent 8 of 354 shown · all 354 OF →
Most prominent 8 of 15 shown · all 15 DH →
Stadium, market-population, title and handle data are curated public facts (Wikipedia/Census/official league facts). Fan Interest, Barometer and reach tier are transparently derived from those facts — weighted (market 0.4, venue 0.2, titles 0.25, heritage 0.15), min-max within MLB — derived structural proxy, not a survey. No fan survey, sentiment scrape, or follower count is used.
+2 more rooms with a shorter average hold.
Room tenures, not starting jobs — the corpus has no per-season depth chart, so holders can overlap (a successor often arrives before his predecessor leaves) and the measure is how often the room changed hands. A holder is a player who produced real value for this club during his years here, which is what separates holding the room from being on the roster. Detected from per-season VAL (1901–2026 here; league coverage is complete from 1999) — rooms the corpus cannot value are not shown.
+347 more one-club men with the franchise.
+1,228 more well-traveled players who wore the crest.
126 seasons — roster, team totals and best players by VAL for each.
Best league-relative tenures in Boston Red Sox history — OPS+ / ERA+ vs each season's own league (100 = average), counting only seasons with the club. Park-unadjusted.
Hitters · OPS+
Pitchers · ERA+