Spencer Arrighetti is a Toronto Blue Jays SP projected for 171 fantasy points on 115.8 IP, 111 K, 4.9 ERA, 1.385 WHIP by the managr projection engine. Monte-Carlo outcome odds put an elite season at 0% and a bust at 13%.
Projection snapshot: 2026-09-28. Rebuilt daily.
Spencer Arrighetti's 2026 projection is built on 116 innings as a starter.
Across 3 seasons with meaningful innings, Arrighetti's biggest strikeout year came in 2024 at age 24: 171 strikeouts over 145 innings, with 7 wins. Innings across 2024, 2025 and 2026 ran 145, 35 and 111.
In 2026, Arrighetti's 4.96 ERA sat close to a 5.30 expected ERA, so the runs allowed matched the quality of contact.
Tracking data from 2026: Arrighetti struck out 21.5% of batters and walked 13.0%, a strikeout-minus-walk rate of 8.5 points, and hitters missed on 25.5% of their swings. Contact against Arrighetti averaged 86.9 mph off the bat, with a 9.2% barrel rate.
Recent pitch tracking flags Arrighetti's arsenal as trending up. Over the last 237 pitches, the whiff rate sits 6 points above and the called-strike-plus-whiff rate sits 3 points above Arrighetti's own baseline. The engine applies a +6% adjustment to the rest-of-season projection for a move this size; the full-season projection is untouched.
Arrighetti's projected range runs from a 163-point floor to a 338-point upside, around a 171-point median: a spread of 175 points, or 102% of the median.
By statistical profile, the closest comparisons to Arrighetti on the board are Janson Junk, Rhett Lowder and Chris Bassitt.
At 26, Arrighetti is in the age range where pitchers typically hold their skills, and the multi-year valuation adds weight for expected growth.
This report is generated from the managr engine's 2026-09-28 snapshot and rebuilt daily.
Curated picks where the model has the highest decision conviction. Updated every render.
Run rankings to populate Market Edge.
Run rankings first.
Mark a player as drafted to get a recommendation.
Studies and awards - the research-side surfaces of the managr platform.
Live snapshot of the projection system.
Backtest, parsimony, ablation, and benchmark - one synthesized report. Output renders in Validation.
Final Value = Raw Projection × MasterConfidence × TeamContext. Each layer answers one question - no overlap.
Recency weighting: prior seasons contribute by recency (more recent = more weight) and sample size (more PA = more weight).
Shrinkage: observed rates regress toward position-specific population means by an amount inversely proportional to sample size. Catches small-sample outliers.
Quality-of-contact adjustments: xwOBA, barrel rate, and bat-tracking metrics replace luck-driven outcome stats with skill-driven ones.
PT modeling: projected PA is anchored to workload tier (full-time, regular, platoon, backup catcher) using historical role distributions.
Monte Carlo: N simulated seasons per player using projected mean + uncertainty, producing P10 / P50 / P90 distribution and bust%.
Confidence layers: four orthogonal multipliers: Roster (depth chart), Role (PT certainty), Sample (career PA), Market (consensus alignment). The Audit tab shows all four for every player.
VAR: Value Above Replacement at the player's primary position. Replacement levels are floored per position so SS scarcity doesn't artificially inflate stable middle infielders.
Tune component weights against historical seasons. Stored in session.
-
-
-
Walk-forward backtests, calibration quality, and benchmark comparisons. Run walk-forward first - most tools depend on its pair pool.
Projects every historical batter-season from prior data only. Reports RMSE, MAE, Spearman ρ, hit rates. Populates the pair pool other validators use.
Walk-forward over historical seasons. Reports RMSE, MAE, Spearman ρ, top-N hit rates.
Distribution, uncertainty, per-archetype performance, calibrated tiers, draft sim.
Load any rival projection or ADP source. Auto-detects player_name + rank / adp / projected.
Where the model finds value the market is missing.
Curated picks from current rankings.
Where the model has measurable advantage.
The safety layer. Realism, false-confidence, forensics - what to remove.
The most important governance tools. Output renders in Validation.
Per-era ablation, error clusters, bias, correlations, removals. Each tells you what to remove. Run walk-forward first.
The smallest model that retains predictive power. Every feature beats the burden of proof.
Live pipeline status and data freshness.
-
Last known status of each underlying data source.
Source status will appear once data has been refreshed.
Issues from the most recent data refresh, if any.
-
MVP, Cy Young, Rookie of the Year - historical winners with their stats, plus model-predicted current-season winners.
Predictions from the current 2026 projection model. Top candidates per award based on projected fantasy points + advanced-stat underlying. League assignment from current team.
Coaching rosters for every MLB team plus a multi-year Fantasy Points Above Average ranking of every MLB coach.
Findings article + all-time top-100 performer leaderboard from every World Baseball Classic (2006-2026).
A growing collection of fantasy baseball studies. Each card opens a detail page with the methodology, the data sources, and (where the data exists today) live computed findings.
Active player injuries, refreshed from upstream sources.
| Player | Team | Pos | Status | Explanation | Replacement |
|---|
Enter players for each side, one per line. Values use your scoring weights and injury-adjusted projections.
| Player | Pos | ProjPts | Status |
|---|
| Player | Pos | ProjPts | Status |
|---|
Every signal, formula, and data source the model uses for player evaluation - organized by product.
Configure your draft session. This stays on this device only.