Roto, head-to-head, DFS, or season-long — POSEIDON's math engine handles every MLB fantasy format. Probabilistic projections for hitters and pitchers, updated every 6 hours from live betting markets.
Interactive walkthrough using real 2024-25 MLB data. Auction draft a roster, learn the difference between roto (5x5) and H2H categories, see how innings caps work, understand the platoon advantage. Shareable replay. No signup.
Salary-cap auction values for any format and team size. Live nomination strategy. Inflation tracker. Tier-aware bidding. Lock players to fix your bids; engine optimizes the rest of your budget.
Every tracked MLB player. Hitter and pitcher splits, platoon data, park factors, injury status.
5x5 · 6x6 · Points · Custom categories. Auction values. Dynasty + dynasty rookie.
DraftKings + FanDuel. Cash vs GPP. Stacking, mini-stacks, contrarian builds, late-swap.
Find the best 2-start SPs each week. Matchup-weighted. Park-adjusted. K-rate floor.
Weekly closer-leverage rankings. Save shares, role security, mid-season changes flagged.
All 30 ballparks. Day vs night, lefty vs righty splits. Drives hitter and pitcher projections.
5-cat category impact. Predicts whether the other manager accepts. Innings cap awareness.
Median · floor · ceiling · 5x5 fantasy points
| # | Player | Team | Pos | Matchup | Floor | Median | Ceiling | HR % |
|---|---|---|---|---|---|---|---|---|
| 1 | Aaron Judge | NYY | OF | vs BOS LHP | 2.4 | 8.7 | 18.2 | 22% |
| 2 | Shohei Ohtani | LAD | DH | @ SD RHP | 2.2 | 8.3 | 17.4 | 19% |
| 3 | Bobby Witt Jr. | KC | SS | vs CWS RHP | 2.1 | 8.1 | 16.9 | 14% |
| 4 | Juan Soto | NYM | OF | vs ATL RHP | 2.0 | 7.8 | 16.4 | 17% |
| 5 | Mookie Betts | LAD | SS | @ SD RHP | 1.9 | 7.6 | 15.8 | 15% |
| 6 | Yordan Alvarez | HOU | DH | vs SEA LHP | 1.8 | 7.4 | 16.2 | 18% |
| 7 | Vladimir Guerrero Jr. | TOR | 1B | vs BAL RHP | 1.7 | 7.2 | 15.4 | 14% |
| 8 | Freddie Freeman | LAD | 1B | @ SD RHP | 1.7 | 7.0 | 14.7 | 13% |
| 9 | Corey Seager | TEX | SS | vs OAK RHP | 1.6 | 6.9 | 14.3 | 14% |
| 10 | Kyle Tucker | CHC | OF | vs MIL LHP | 1.6 | 6.8 | 14.6 | 15% |
Projections update every 6h from the live market. A published, walk-forward accuracy record lands when the fantasy model is validated — until then we won't claim a hit rate we haven't earned.
Standard salary calculators are static. Ours tracks inflation in real-time during your auction draft. As teams overpay or underpay, every remaining player's value re-prices instantly.
Most leagues cap weekly innings. Streaming too many SPs wastes the cap; streaming too few wastes K + W upside. POSEIDON's optimizer finds the maximum-EV streaming pattern given your cap.