Roster Locker supports seven fantasy platforms across six sports, all behind one login: Sleeper, ESPN, Yahoo, MyFantasyLeague, Fleaflicker, Fantrax, and Fantasy Premier League — covering NFL, NBA, MLB, NHL, WNBA, and Premier League soccer. One membership connects all of them, and each platform links through its own official method, never by storing your password. Here's the full picture.
The six sports
- NFL — the deepest field, supported across most platforms.
- NBA — fantasy basketball, including category and points formats.
- MLB — fantasy baseball, roto and head-to-head.
- NHL — fantasy hockey, where goalie management often decides leagues.
- WNBA — covered on ESPN, a format almost no other tool takes seriously.
- Premier League soccer — via Fantasy Premier League (FPL).
The seven platforms and how each connects
- Sleeper — your username connects every league you own across NFL, NBA, and MLB.
- ESPN — public leagues connect with the league URL; private leagues use your own encrypted
access cookies. Covers NFL, NBA, MLB, NHL, and WNBA.
- Yahoo — a single Yahoo sign-in (OAuth) links your football, basketball, baseball, and hockey
leagues; you authenticate on Yahoo's own site.
- MyFantasyLeague (MFL) — paste your league URL, then pick which franchise is yours.
- Fleaflicker — your account email finds every league on your account (NFL and MLB).
- Fantrax — one read-only Secret ID imports leagues across five sports (NFL, NBA, MLB, NHL,
soccer).
- Fantasy Premier League (FPL) — connect your squad with just your numeric Team ID.
For step-by-step walkthroughs, we have a dedicated connect guide for each platform.
What "supported" means here
Support isn't just connecting — it's that the AI actually reasons about each league in its own terms. A connected NBA category league, an NFL dynasty roster, and an FPL squad each get analysis tuned to how that sport and format play, not a football framework bent to fit. That breadth — six sports and seven platforms, with roster-aware AI across all of them — is the core of what makes Roster Locker different from single-sport tools.
The bottom line
If you play on Sleeper, ESPN, Yahoo, MyFantasyLeague, Fleaflicker, Fantrax, or FPL — across NFL, NBA, MLB, NHL, WNBA, or soccer — Roster Locker connects it, in one place. See the full list and get started at roster.locker.
One AI for every fantasy league you own.
Roster Locker covers 6 sports and 7 platforms — trade grades, start/sit calls, waiver targets and live draft help, grounded in your actual rosters and scoring settings. Founder pricing locked for life.
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