The 2025 NFL season is here, and if you’re serious about daily fantasy football, you need more than gut instincts. You need NFL DFS Sims, a proven way to build lineups with game simulations instead of guesswork. This guide walks you through how to use NFL Sims step by step, explains why it should be the cornerstone of your NFL DFS strategy, and shows you how to get started with our tools today.
How to Use NFL DFS Sims for Winning Lineups in 2025
Kick Off NFL DFS Season With These Deals
- $1 NFL Sims Core Access – Want to see the power of Sims without the commitment? Get Core Access for Thursday & Friday Night Football for just $1 with code OPENER.
- 30% Off NFL Monthly – Ready to grind the entire month? Use code FOOTBALL and get 30% off our NFL Monthly package—your full playbook for Main Slates, Showdowns, and every edge in between.
- 10% Off NFL & All-Access Yearly – If you’re all-in this season, lock in long-term savings. Code BIRD scores you 10% off NFL Yearly or All-Access, giving you the Sims plus every tool for every sport we cover.
Don’t wait. NFL season is short, and every slate matters. Grab your package today, run your lineups through the Sims and start playing with an edge.
Step 1: Start With the Contest Generator
Everything begins with the Contest Generator, where you set up the parameters for the contests you actually play:
- Choose your site: DraftKings, FanDuel, Yahoo or OwnersBox.
- Select the slate: Main, Afternoon or Showdown (Thursday Night, Sunday Night or Monday Night).
- Mirror the contest size: Don’t just max out; match your pool to the field you’re competing against.
This ensures your simulations are realistic, giving you a true picture of what lineups will look like in your contests.
Pro tip: On our Max package, you can now generate up to 50,000 lineups for Showdown slates, which is a massive advantage for primetime games.
Step 2: Simulate the Slate
Once you’ve set up the Contest Generator, hit Simulate Lineups. Here’s what happens next:
- The slate is simulated tens of thousands of times on a play-by-play basis.
- Every lineup you generated is tested against the others.
- Results factor in correlations (QB-WR stacks, defenses vs. opposing offenses, etc.), ownership and payout structures.
The Sims then rank your lineups by Sim ROI. In other words, you see exactly which lineups are projected to be the most profitable over time.
Step 3: Customize Your DFS Strategy
The beauty of Sims is that they’re flexible. You can leave them as-is and simply play the top ROI lineups, or you can tweak them to fit your style. Options include:
- Upload custom projections via CSV.
- Boost or cap player exposures to control risk.
- Adjust stack types (QB + WR + TE, QB + WR + WR, etc.).
- Filter lineups by player, team, or contest archetype (low stakes vs. high stakes).
For example:
- If Mike Evans shows up in 42% of your builds but you only want 25%, cap him at 25% and the Sims will reallocate exposure automatically.
- If you don’t want QB + 3 stacks, filter them out in seconds.
This kind of control is what separates casual players from profitable grinders.
Step 4: Export & Enter With Ease
After simulations, you can:
- Favorite your top 150 lineups based on ROI.
- Export them directly to DraftKings or FanDuel using our Entry Manager.
- Skip the messy copy-paste. Our tools create the upload-ready CSVs for you.
It’s the most efficient way to take your Sim-optimized lineups straight into real contests.
Why NFL DFS Sims Should Be Your Edge in 2025
DFS is tougher than ever. Fields are sharper, ownership is more efficient and every edge matters. Relying on “hunches” is a losing long-term strategy.
NFL DFS Sims give you the only sustainable edge:
- They remove bias.
- They account for correlation.
- They show you which lineups win over thousands of simulations, not just in theory, but in practice.
That’s how you stay ahead in NFL DFS.
