Arm Watch - Fantasy Pitcher Injury Monitor
Tracks pitcher velocity, spin rate, pitch mix, and workload trends across the MLB season, flagging injury risk before official IL moves and giving fantasy managers a 24-to-48-hour head start.
Fantasy baseball managers in head-to-head and dynasty leagues
- Velocity trend charts per pitcher with deviation alerts (e.g., 95.6 mph average dropping to 93 mph mid-game)
- Spin rate and pitch-mix change detection across starts
- Workload tracker with innings-pitched and rest-day analysis
- Push notifications when a pitcher shows risk signs before mainstream news breaks
Pitcher injuries are surging across MLB (McClanahan, Buxton, others) and the NBC Sports article explicitly uses McClanahan's velocity dip as the lead injury narrative; fantasy managers who react first to small performance signals win their waiver weeks.
Multiple recent waiver-wire columns (CBS Sports, RotoBaller) center on pitcher injury replacements and McClanahan's status, showing fantasy managers actively consume injury-leverage content, though '500+ searches' for a single player name is modest signal.Fantasy Baseball Waiver Wire: Cole Ragans injury clouds outlook as replacements emerge ↗Shane McClanahan 2026 Fantasy Baseball Outlook ↗
Space is already crowded: RotoGraphs ships a dedicated 'Pitcher Injury Finder' with fastball velocity grading, FanGraphs offers PitchingBot, and an open-source XGBoost pitcher-injury predictor exists on GitHub — no wide-open gap.Pitcher Injury Finder & Fastball Grades - RotoGraphs ↗Baseball Pitcher Injury Predictor - GitHub ↗PitchingBot Visualizer | FanGraphs Lab ↗
Fantasy baseball subscription market is mature and proven: Pitcher List Pro, FantasyPros premium tiers, and RotoBaller premium all monetize injury-adjacent tools, demonstrating clear willingness to pay.Subscribe To Pitcher List | Get PL Pro & PL+ ↗Premium Subscription Prices and Plans | FantasyPros ↗Premium Fantasy Baseball Tools - RotoBaller ↗
Pitcher health is a perennial MLB storyline and Statcast infrastructure (public MLB API, Baseball Savant, PitchProfiler) keeps deepening the underlying data, supporting a multi-season product runway.MLB Data API — Live Scores, Pitch-by-Pitch, Statcast Metrics ↗MLB Statcast Search - Baseball Savant ↗Public MLB API documentation ↗
Building is tractable: public Statcast data is accessible via documented endpoints (SportAPI, PitchProfiler, Baseball Savant), and the open-source XGBoost pitcher-injury predictor demonstrates the core modeling is replicable; main lift is real-time alerting, threshold tuning, and UX.MLB Pitch Data API | PitchProfiler ↗MLB Statcast API | Big Balls Sports Data ↗Baseball Pitcher Injury Predictor - GitHub ↗