FantasySwap
Paste any two MLB rosters and get an instant fairness verdict on a proposed trade, with projected rest-of-season impact for every stat category and a 'who says no' explanation in plain English.
Fantasy baseball league players in head-to-head or rotisserie formats
- Stat-category impact projection using rest-of-season ZiPS/Steamer-style forecasts
- Dynasty/keeper mode that factors in prospect ETA and minor-league call-up probability
- 'Counter-offer' button that proposes fair follow-up packages
- Trade history tracker so league members can see who consistently wins or loses deals
With Ryan potentially on the move and every contender scrambling for arms, fantasy managers are scrambling too — and most free trade checkers don't handle prospect value well.
US fantasy sports has 50M+ players (2022) and a $24.9B market growing at 15.2% CAGR, and Joe Ryan MLB search interest confirms baseline seasonality — but baseball-specific trade volume is a fraction of football demand.Fantasy Sports Statistics: Market Size, Trends, and Share by 2026 ↗Fantasy Sports Market Size And Share Report, 2025-2030 ↗
Market is saturated: FantasySP, RotoBaller, Razzball, TheTradeAnalyzer, Dynatyze, and PFSN all offer free fantasy baseball trade analyzers, and Dynatyze explicitly handles prospect rankings for keeper/dynasty formats — directly undercutting the 'no good prospect tool' pitch.Fantasy Baseball Trade Analyzer and Trade Calculator ↗MLB Trade Calculator — Fantasy Baseball | Dynatyze ↗MLB Trade Analyzer | The Trade Analyzer ↗
FantasyPros proves willingness to pay ($3.99–$22.99/mo, 500K+ customers) but trade analysis is bundled as one feature among many, and most serious competitors are free; conversion against 6+ entrenched free tools during a 6-month MLB window is hard.Premium Subscription Prices and Plans | Upgrade at FantasyPros ↗2025 Fantasy Baseball Trade Analyzer and Trade Calculator ↗
Fantasy sports market is structurally growing (15% CAGR), but MLB trade-checker usage is sharply seasonal (April–September) and a thin LLM wrapper over public projections is vulnerable to incumbents adding the same 'plain English verdict' feature.
MVP is a weekend build: pull Steamer/ZiPS projections and prospect lists (FanGraphs, MLB Pipeline), normalize by category, and wrap an LLM call for the plain-English explanation — no league-host integration or sync required.