2026 Season · KC Roster
Sutter Health Park, West Sacramento, CA — opened 2000 · 13,416 seats. 9× champions · last 1989.
Every MLB player the encyclopedia attributes to the Athletics 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 Athletics — ranked by seasons of service. Tenure is the span the corpus attributes.
MLB players who wore the Athletics 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 Athletics has passed down, steadiest first. The 2B room is their most stable — 5 holders across 99 years, a new one every 10.2 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.
541 player-season slots overlap another club's recorded span and are credited to neither (16.3% of considered span evidence).
Monument Timeline — who held it, season by season
1876–2026 · 5 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 1880. Relocated eras carry forward with the franchise.
Most prominent 8 of 1068 shown · all 1068 P →
Most prominent 8 of 217 shown · all 217 C →
Most prominent 8 of 139 shown · all 139 1B →
Most prominent 8 of 161 shown · all 161 2B →
Most prominent 8 of 144 shown · all 144 3B →
Most prominent 8 of 135 shown · all 135 SS →
Most prominent 8 of 459 shown · all 459 OF →
Most prominent 8 of 20 shown · all 20 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 (1882–2026 here; league coverage is complete from 1999) — rooms the corpus cannot value are not shown.
+615 more one-club men with the franchise.
+1,234 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 Athletics history — OPS+ / ERA+ vs each season's own league (100 = average), counting only seasons with the club. Park-unadjusted.
Hitters · OPS+
Pitchers · ERA+