MLB DFS Lineup Simulator & Optimizer
MLB DFS is the most volatile major DFS sport — even elite hitters fail to reach base in a third of their games — and the most stack-driven, because runs are sequential events shared by adjacent hitters in the batting order. Park factors, handedness splits, and pitcher matchups drive slate-to-slate pricing inefficiencies.
Why simulate MLB lineups?
Five-man team stacks dominate MLB GPPs because when an offense erupts, consecutive batters share the rally. Simulation quantifies that: correlated iterations show a 5-stack's 90th-percentile outcome towering over five uncorrelated bats with identical mean projections.
Correlated multivariate Monte Carlo is the key model here — it simulates teammates' outcomes moving together, which is what prices a stack's real ceiling.
Running a MLB simulation
- Pick a slate. Every slate loads its own player pool with base projections, salaries, and ownership estimates already merged in.
- Adjust the pool. Type new projections into the Proj column, lock players you're committed to, block players you want to fade, cap exposure per player, and set up stacking rules.
- Run the simulator. The engine iterates thousands of correlated lineups against your constraints and returns them ranked by leverage, ceiling, or projected points.
- Export site-formatted CSV. Upload directly to DraftKings, FanDuel, or Yahoo. The row order matches your ranked lineups so the top of the CSV is the top of your entries.
Slates lock at scheduled kickoff. Late-breaking news in the hour before lock routinely reshuffles projections, so the simulator's inline projection edits are designed for rapid last-minute adjustment.
Common MLB DFS mistakes the simulator catches
- Building without correlation. Two teammates who share a game outcome cannot be treated as independent — the simulator's correlated model prices the joint distribution correctly.
- Over-relying on point projections. The mean is only one number; the distribution's shape matters more for tournaments than for cash games, and simulation is how you see that shape.
- Ignoring exposure caps. Concentrated exposure to one player crushes portfolio-level variance — the simulator's exposure cap prevents accidental over-allocation.
MLB DFS on each plan
| Plan | MLB access | Models | Iterations |
|---|---|---|---|
| Basic $19.99/mo | As your 1 sport pick | Monte Carlo | 500 |
| Pro $49.99/mo | As 1 of your 4 sport picks | Monte Carlo + Correlated Monte Carlo | 10,000 |
| Elite $99.99/mo | Included (all 21 sports) | Monte Carlo, Correlated MC, Genetic, Bootstrap | 50,000 |
MLB DFS questions
Can I simulate MLB DFS lineups?
Yes — DFS Simulator supports MLB (Major League Baseball) with positional rosters under a salary cap, where teammate correlation (stacks) drives tournament ceilings. Pick a slate, adjust projections, apply locks and blocks, run up to 50,000 iterations, and export site-formatted lineup CSVs.
When is MLB DFS in season?
MLB slates run roughly March – October. Outside that window the sport sits out of the slate picker until the season resumes.
Which DFS Simulator plan includes MLB?
MLB is one of the team-sport slots on every plan. Basic ($19.99/mo) picks 1 sport — many users choose MLB as that slot when the season is active. Pro ($49.99/mo) covers any 4 sports, so MLB sits alongside three others of your choice. Elite ($99.99/mo) includes all 21 sports plus advanced models and no cooldown on switching sport picks.
Which simulation models work best for MLB DFS?
Correlated multivariate Monte Carlo is the key model here — it simulates teammates' outcomes moving together, which is what prices a stack's real ceiling. Basic includes quasi-random Monte Carlo; Pro adds correlated MC; Elite unlocks genetic search and bootstrap resampling as well.
How does the simulator handle MLB slates?
The workflow is: pick a slate; adjust the pool; run the simulator; export site-formatted csv. Full step-by-step details are in the workflow section above.
When do MLB DFS slates lock?
Slates lock at scheduled kickoff. Late-breaking news in the hour before lock routinely reshuffles projections, so the simulator's inline projection edits are designed for rapid last-minute adjustment.
MLB DFS by site
Each DFS site scores MLB differently — roster shapes, salary caps, and scoring bonuses all shift optimal lineup construction. The per-site pages cover the specifics for the sport-site combination you actually play.
Related DFS sports
Simulation strategy guides
Ready to simulate MLB slates?
Plans from $19.99/month. Pick MLB as your sport and run your first simulation in minutes.