RotoCore
The DIY lineup builder for DraftKings NFL
Your numbers, your rules, your lineups. RotoCore is a DIY lineup builder for DraftKings NFL classic and showdown contests: it builds up to 150 unique lineups from the edits you make and the rules you set. It does not tell you who to play.
your builder, your way
What it is
A builder. You shape the player pool and the rules; RotoCore turns them into many different lineups that fit the salary cap. The goal is a tournament portfolio other people don't have, not a single best lineup.
What it is not
- No projections of its own. The FPPG you see is each player's DraftKings season average. Change it to what you believe, or upload your own (Season Pass).
- No ownership estimates, no simulations. If you want to be contrarian, you pick the players; RotoCore makes sure they show up across your build.
- DraftKings NFL only: classic and captain/showdown slates.
Built for people who enter 20 to 150 lineups in large-field tournaments and want to build them their own way: their own player reads, their own stacks, their own exposure. It builds one cash lineup too, but that is not what it is for.
what you control
your numbers
FPPG is each player's DraftKings season average, not a projection. Type a new number or nudge it 5% at a time; the build uses yours and ΔFP% shows how far you moved each player. Free. With the Season Pass, upload a CSV of your projections and the slate builds from them.
your stacks and rules
QB with one to four pass catchers, RB with his defense, RBs as stack partners, a bring-back from the other side, and a share of the build for each shape. Plus a cap on players per team, no QB against the defense he faces, no TE in FLEX. Season Pass.
your pool, your exposure
Trash players by hand, or whole groups by salary, FPPG floor or injury status. Set min and max exposure per player (100% min puts a player in every lineup), a salary floor, and 2 to 6 unique players between lineups. Free.
lots of lineups, then prune
Build up to 150 unique lineups at once; volatility spreads a big build across more players (Season Pass). Then prune to the count you want to enter four different ways with a preview, delete or duplicate lineups, compare two builds, and download a DraftKings-ready CSV (Season Pass).
before you sign up
- Salaries, the player pool, odds and injury tags refresh three times a day; weather hourly. Not live, so check late injury news yourself.
- No projections of its own, no ownership numbers, no simulations. Type your numbers in, or upload a CSV with the Season Pass; the quality of a build depends on them.
- DraftKings only, NFL only, classic and captain/showdown contests.
- Lineups are edited at the lineup level: delete, duplicate, prune, compare. There is no one-player swap inside a lineup.
- Free accounts build up to 20 lineups; the demo builds 3 with no account.
- Stacks, volatility, team rules, per-position exposure defaults and the CSV export are Season Pass features. One payment for the season, nothing renews.
try it on this week's main slate
Three builds of up to three lineups, no account. Free accounts build up to 20 lineups. The season pass unlocks 150 lineups, stacks, volatility, exposure rules and CSV export for one payment.
try the demo see season pass pricinghow it works
1. pick a slate
any DraftKings NFL classic or showdown contest. The pool loads with salaries, FPPG, injury tags, implied team totals, opponent rank and bye weeks
2. shape the pool
edit FPPG, set min and max exposure, trash who you don't like, and auto-trash by salary, FPPG floor or injury status
3. set the rules
how many lineups, salary floor, unique players between lineups; with the Season Pass, stacks, bring-back, volatility, players per team, team exposure, no QB vs DST, no TE in FLEX
4. build, prune, export
build up to 150 lineups, prune them to the count you want to enter, compare builds, then download a CSV you can upload straight to DraftKings (Season Pass)
