About FantasyArb
Every fantasy football platform ranks players differently. ESPN uses projections. Sleeper uses ADP. Yahoo has its own algorithm. But they all claim to show you the best order to draft in.
The problem: none of them agree with each other, and none of them perfectly match expert consensus. Those gaps are where draft edge lives. A player ranked #25 on your platform but #12 by experts is being handed to you at a discount. A player ranked #8 on your platform but #20 by experts is a trap.
FantasyArb makes those gaps visible. Pick your draft platform, and instantly see which players are undervalued (steals) and overvalued (overpays) relative to FantasyPros Expert Consensus Rankings.
How It Works
Aggregate
We pull live draft lobby rankings from ESPN, Sleeper, and Yahoo, plus FantasyPros ECR as the expert baseline. Updated nightly.
Score
Our arbitrage formula weighs overall rank gaps, positional rank gaps, draft importance, and tier boundaries to produce a single arb score per player.
Exploit
Sort by arb score to find the biggest mispricings. Filter by position. Switch scoring formats. Build your draft plan around the gaps your league doesn't see.
What Makes the Arb Score Different
A simple rank difference (platform #15, ECR #5 = +10) doesn't capture the full picture. Our arb score accounts for:
Draft importance: A 10-spot gap in the first round matters far more than a 10-spot gap at pick 180. The score amplifies early-round mispricings where the draft capital is highest.
Positional context: Being 5 spots off at QB (shallow pool) is different from 5 spots off at WR (deep pool). The score blends overall and positional rank gaps.
Tier boundaries: Crossing from Tier 2 to Tier 3 is a bigger deal than moving within a tier. The score rewards mispricings that cross expert-defined tier lines.
Who Built This
FantasyArb was built by a fantasy football player who got tired of getting burned by platform rankings. After one too many drafts where the "best available" on the board wasn't actually the best available according to experts, the idea was simple: what if you could see exactly where your platform's rankings diverge from consensus?
It's a solo side project, built with care, and priced to be a no-brainer for anyone who takes their draft seriously. One-time seasonal fee, no subscription pressure.
Frequently Asked Questions
Which platforms do you support?
ESPN, Sleeper, and Yahoo, compared against FantasyPros Expert Consensus Rankings (ECR). We pull the actual draft lobby sort order from each platform, not editorial rankings.
How often is data updated?
Nightly. Rankings change frequently during draft season as platforms update their projections and ADP shifts. You'll always see the latest mispricings.
What scoring formats are supported?
Standard, Half-PPR, Full PPR, and Dynasty. Not all platforms provide data for every format (ESPN has Standard and PPR only, for example), and the tool automatically handles this.
What's included in the free tier?
The top 20 players by ECR overall rank, with full arb scores for every platform. Enough to see the value and decide if the full tool is worth it for your draft.
How much does full access cost?
$14.99 one-time for the entire NFL season (founding member price). No recurring subscription. Full access to all players, positional views, all platforms, all scoring formats.
Can I use this during my live draft?
Yes. Open FantasyArb alongside your draft platform. As players get picked, the remaining arb scores tell you who's still undervalued. Sort by arb score to find the best available steal at any point in your draft.