Does +EV Betting Actually Work? We Graded 84,000 Picks to Find Out
Everyone in sports betting claims an edge. Almost no one shows their full record. We do — every pick timestamped before the game and graded in public, wins and losses alike. So we pulled the whole dataset and ran the honest numbers on whether positive-expected-value betting actually works.
Snapshot: June 2026 · 84,376 distinct picks graded since December 5, 2025 (171,806 total across 48 books).
The short answer: yes — by about 5%
Across 79,564 decided picks, the model won 56.1% of the time for a +5.32% return on investment and +4,230 units of profit. For context, you need to win about 52.4% at standard -110 pricing just to break even — so 56.1% is a meaningful, sustained edge over a large sample. And it isn’t a stale early run: over the last 90 days, the model still produced 53.6% / +4.32% ROI across 32,404 picks.
The edge lives in UNDERs — and we show the OVERs that lost
Prop lines are shaded toward the OVER because casual money loves big numbers. That bias underprices UNDERs, and the data shows it starkly. Note we’re publishing the losing side too — that’s the point.
| Market | Decided | Win rate | ROI |
|---|---|---|---|
| UNDER | 46,905 | 59.3% | +10.81% |
| OVER | 32,349 | 51.8% | −2.60% |
By sport — including where we’re only breaking even
| Sport | Decided | Win rate | ROI |
|---|---|---|---|
| Soccer | 3,403 | 63.4% | +20.8% |
| NHL | 9,136 | 62.2% | +16.4% |
| Tennis | 5,007 | 57.6% | +12.8% |
| WNBA | 798 | 58.3% | +11.3% |
| NBA | 45,713 | 55.1% | +2.2% |
| MLB | 10,115 | 50.6% | -0.1% |
MLB sits at roughly breakeven and we’re not going to pretend otherwise — that honesty is exactly why you can trust the sports that are winning. See the always-current numbers on the public track record.
Methodology (the part most "records" skip)
- Distinct picks, not inflated counts. The same pick can appear across all 48 books; we de-duplicate to one distinct pick so coverage doesn’t fake a bigger sample or win rate.
- Neutral pricing. ROI uses a representative price, not the best-available line, so the return isn’t cherry-picked upward.
- Pre-game timestamps, public grading. Every pick is locked before the game and graded against the official box score. Wins and losses both count.
- Full scope. These are all graded model picks since Dec 5, 2025 — not a hand-selected subset. Our curated, high-conviction published picks perform better than this all-in average.
- Honest limits. This is a ~6-month window, results vary by sport, and no edge removes the variance of any single bet.
Frequently Asked Questions
Does +EV betting actually work?
Yes — over a large enough sample, betting positive expected value produces a positive return. Across 84,000+ graded picks since December 2025, Turtle +EV Labs’ model won 56.1% of decided bets for a +5.32% ROI, with positive closing line value. The edge is real but it is an average over thousands of bets, not a guarantee on any single play.
How do you know these numbers aren’t cherry-picked?
Every pick is timestamped before the game and graded in public. This study counts de-duplicated distinct picks (not the same pick inflated across 48 books) at a neutral price (not the best available), and it shows the losing cuts — OVERs lost money and MLB was roughly breakeven. We publish the misses, not just the hits.
Why are UNDER bets so much more profitable?
Sportsbook prop lines are systematically shaded toward the OVER, because casual bettors love betting big numbers and "yes" outcomes. That public bias leaves UNDERs underpriced. Our data shows it clearly: UNDERs hit 59.3% for +10.81% ROI while OVERs lost at −2.60%.
Is closing line value (CLV) positive?
Yes — average CLV across the sample is positive (+0.61), meaning our picks were, on average, priced better than where the market closed. Beating the closing line is the strongest independent signal that an edge is real rather than variance.
See it live, not in a screenshot
The full public record updates every day. Browse it, try the free tools, or see today's +EV picks.