What DFS platforms does DFS Only support?

DFS Only supports DraftKings Classic and Showdown contest formats for MLB and NFL, with NBA launching for the 2026-27 season opener. Every sport is included in the same $39 per month subscription. The platform is built specifically for DraftKings salary structures, roster rules, and scoring.

DraftKings DFS Optimizer + Sims — MLB, NFL & NBA

Free · Tonight's board

EVERYONE KNOWS THE "BEST" PLAYS.
THAT'S NOT AN EDGE.

Leverage is how often a player shows up in winning sims, minus how much of the field rosters him. Positive means underowned winner. Negative means the trap everyone's walking into. Here's the top of tonight's board — free.

LEVERAGE BOARD · MLBSAMPLE SLATE

#PLAYERPOS · TEAMOWN%WIN%LEVERAGE

Full board — every player, every slate — unlocks with a day pass.

Unlock Tonight — From $5 →

Sample slate shown. Win% = share of winning simulated lineups that include the player.

+ POSITIVE

Wins in the sims more than the field expects. This is where tournaments are won.

− NEGATIVE

Popular, but wins less than his ownership says. Rostering him just ties you to the crowd.

YOUR CALL

Lock him, fade him, or cap his exposure. The optimizer builds around your read.

Watch it work

SLATE TO UPLOAD.
NO EDITS.

This is the actual app, recorded live.

ONLYDFS.COM/APPREC

ONLYDFS.COM/APPLIVE SLATE

DFS Only player projection cards with ceiling, floor, ownership, optimal rate, and leverage

PROJECTIONS WITH A RANGECeiling, floor, ownership, optimal rate, and leverage on every player — plus the matchup stats behind them.

Weather, game environment, and favorable and unfavorable matchup tables

MATCHUPS AND ENVIRONMENTImplied totals, weather, and every hitter's edge — or problem — against tonight's pitcher.

NFL game breakdown with play-caller tendencies, defensive scheme, and position multipliers

NFL GAME BREAKDOWNPlay-callers, coverage shells, pace, and position-by-position multipliers for every game.

Optimizer build settings: salary floor, uniques, exposure, and contest presets

YOUR RULES, ENFORCEDSalary floor, uniques, exposure caps, team and game limits, and contest presets.

Stack shape allocation for QB stacks and bring-backs

STACK SHAPE CONTROLCap any stack shape — QB+2+1BB, QB+3, naked QB — or leave it free-form.

Built DraftKings NFL lineups with salary, projection, ownership, and stack type

LINEUPS BUILT IN-SIMEvery lineup with its stack, salary, projection, ceiling, and ownership at a glance.

Player exposure bars across a 40-lineup portfolio

PORTFOLIO EXPOSURESee exactly how much of your portfolio rides on each player before you upload.

Structure breakdown showing top-10 rate and ceiling by stack shape

WHAT ACTUALLY WON THE SIMSTop-10 rate and ceiling by stack shape, so you know which structures pay — not which ones feel right.

Build Your First Lineup →

Why it's different

THE SIMS BUILD IT.
YOU CALL THE SHOTS.

Plenty of tools simulate the slate. Most grade your lineups after they're built — and the few that build inside the sims tell you to stop touching the settings. DFS Only does both halves.

	Traditional optimizer	Sim grader	Black-box sim builder	DFS Only
Projections	−One average number	Varies	Varies	+Floor, ceiling, and median for every player
Where lineups come from	Rules you set	Rules first, then sims rank them	+Inside the sims	+Inside the sims
Correlation	−Only what you force	~Scored after the build	+Built in	+Built in — stacks happen because games erupt
Your control	+Full	+Full	−Hands-off by design	+Full — locks, fades, stacks, exposures
Leverage vs. ownership	—	Varies	Varies	+On every player, every slate

01 · PROJECT

A RANGE, NOT A GUESS

Machine-learning projections trained on real games, weighted for matchup, park, weather, and spot in the order.

02 · SIMULATE

100,000 WAYS

The slate plays out 100,000 times. When a team erupts, its players go off together — the way it really happens.

03 · BUILD

A PORTFOLIO

Lineups that each cover a different way the night breaks, with your exposure caps and locks enforced across the set.

04 · SWAP

LATE SWAP

A scratch an hour before lock? Swap him out and re-optimize the open spots around the players already locked in.

05 · TALK

SLATE CHAT

A chat room for every slate, inside the app. Pivots, news, and bad beats without switching to Discord.

06 · EXPORT

CSV TO DK

Build, hit export, upload to DraftKings. Classic and Showdown supported.

Real slates

TESTED WITH
REAL MONEY.

Real result · 1st place

DFS Only — MLB $300 Dime Time, 1st and 3rd place

MLB Dime Time · 1st & 3rd

MLB $15K mini-MAX · 3rd

DFS Only — MLB $2K Quarter Jukebox, 2nd and 3rd place

MLB $2K Jukebox · 2nd & 3rd

DFS Only — MLB $625 Quarter Jukebox, 2nd and 3rd place

MLB $625 Jukebox · 2nd & 3rd

DFS Only — MLB $300 Dime Time, 3rd place

MLB Dime Time · 3rd

Not built by a company. Built by a guy who plays. Fifteen years of grinding DraftKings, one realization: the pros aren't predicting outcomes, they're running thousands of possible futures. So I built the tool that does that — and never takes the controls out of your hands. When something breaks, you're talking to the guy who wrote it.

— Mike · builds it, plays it nightly · @abadmanmike · Read the full story →

Pricing

TRY ONE SLATE.
THEN DECIDE.

Everything included either way — projections, sims, leverage, and the full optimizer. No upsells, no add-ons.

START HERE

DAY PASS

Unlocks the full sport for one day. No subscription.

$5MLB

$5NBA

$12NFL

Full projections and 100,000 sims
Leverage, ownership, and sim win rates
Complete optimizer and CSV export

Try Tonight's Slate →

BEST VALUE

PRO · ALL SPORTS

Billed monthly. Cancel anytime.

$39/mo

Projections trained on real games
100,000 game simulations
Leverage & sim win rates
Projected ownership data
Floor / ceiling / value scores
Stack builder + team allocation
Build full lineup portfolios
CSV export to DraftKings

Get Pro →

Secure checkout via Stripe

FAQ

COMMON QUESTIONS

What is a Monte Carlo simulation?+

Instead of using a single projection for each player, we generate 100,000 random game outcomes using correlated probability distributions. Players on the same team and in the same game are linked — when the game goes high-scoring, everyone benefits. This gives you a much more realistic picture of upside, floor, ceiling, and optimal lineups.

What does "leverage scoring" mean?+

Leverage = simulation win rate minus projected ownership. If a player shows up in 15% of winning lineups but only 6% of the field rosters him, that's +9 leverage — a huge edge in GPPs. Negative leverage means the field is overvaluing a player relative to their actual win potential.

What platforms do you support?+

We support DraftKings Classic and Showdown contest formats for MLB and NFL, with NBA launching for the 2026-27 season opener — every sport included in the same $39/mo plan. We're built specifically for DK's salary structures, roster rules, and scoring. FanDuel support is on the roadmap.

How are your projections generated?+

We use gradient-boosted machine learning models trained on real MLB, NFL, and NBA box scores, with separate models for each sport and position. Features include rolling performance windows, matchup data, Vegas lines, park factors, and weather conditions. Models are retrained as each season progresses.

Can I export lineups to DraftKings?+

Yes — you can export your lineup portfolios as CSV files formatted for direct upload to DraftKings. Build your lineups, hit export, upload to DK. That's it.

How much does it cost?+

$39/mo for full access to every sport — projections, sims, leverage, and the complete optimizer. Cancel anytime. If you only want one slate, a single-day pass unlocks the full sport for one day: MLB $5, NBA $5, NFL $12.

How is this different from sim tools like SaberSim or Stokastic?+

Same family of approach, different philosophy. Some sim tools build lineups from ownership and stack rules first, then simulate the finished lineups to rank them — the sims grade, they don't build. Others construct from sims but discourage you from touching exposures and rules. DFS Only builds every lineup inside the sim worlds and keeps the full optimizer toolkit — exposures, locks, stack settings — in your hands. Same sim power; your read stays in the driver's seat.

Do I have to trust the sims blindly, or can I use my own reads?+

Your reads drive it. Lock the players you believe in, fade the ones you don't, set your stacks and exposures — and the optimizer builds inside the sims around your calls. The simulations bring the correlation; you bring the slate read. That's the whole point.

THE FIELD
BUYS CHALK.
YOU BUY
LEVERAGE.

EVERYONE KNOWS THE "BEST" PLAYS.
THAT'S NOT AN EDGE.

SLATE TO UPLOAD.
NO EDITS.