Betting Guides & Data Analysis
Everything here is written against our own database of 41,000+ graded games and a model we test in public. No recycled betting folklore — when we make a claim, we show the sample size behind it.
Start Here
Betting Odds Explained: American, Decimal, and What They Really Mean
How to read -150 and +130, convert between American and decimal odds, calculate implied probability, and see exactly how much the vig costs you on every bet.
6 min readHome Advantage, Measured Across 41,000 Games
We measured home win rate and margin across four sports in our history database. College basketball's home edge is enormous; MLB's is nearly zero.
8 min readHow Accurate Are Betting Markets? We Checked 5,108 Closing Lines
We compared 5,108 NCAAB closing spreads to actual final margins. Markets are unbiased but noisy — and that noise is why the 52.38% bar is so hard to clear.
8 min readKelly Criterion: How We Size Bets, and Why Full Kelly Is Dangerous
Full Kelly at a 55% edge still sizes bets big enough to hand you 65%+ bankroll swings. The math behind Kelly sizing, and why we bet a fraction of it.
9 min readMLB Park Factors, Measured: What 1,400 Games Say About Every Ballpark
We measured run scoring in all 30 MLB parks across the 2026 season. Coors isn't even the highest — here's what actually matters for totals bettors.
8 min readWe Rejected 4 of Our Last 5 Models. Here's Why That's the Point
In July 2026 we tested five model candidates against strict holdout gates. Four failed. Here's the process, the numbers, and why we're publishing the losses.
8 min readWhy Our Model Passes on Most Games (and Why That Makes It Trustworthy)
Our holdout data shows low-conviction picks lost 170 units while high-conviction picks won 208. So we cut volume — and turned totals off entirely.
7 min readBetting Basics
How odds, spreads, totals and moneylines actually work.
Betting Odds Explained: American, Decimal, and What They Really Mean
How to read -150 and +130, convert between American and decimal odds, calculate implied probability, and see exactly how much the vig costs you on every bet.
6 min read · Updated 2026-07-12Moneyline vs. Run Line: Why Baseball Betting Is Different
In basketball the spread moves and the price holds near -110. In baseball it's reversed — the run line is frozen at 1.5 runs and the price moves instead.
6 min read · Updated 2026-07-12The Vig: The Silent Tax That Beats Most Bettors
A worked look at what the vig costs a coin-flip bettor over time — the 52.38% breakeven line, the 500-bet compounding math, and why reduced juice matters.
6 min read · Updated 2026-07-12Strategy & Bankroll
Staking, value, and the discipline that separates winners from action junkies.
Bankroll Management: The Only Betting Skill in Your Control
A genuine 54% bettor has roughly a two-in-three chance of a 6-game losing streak somewhere in a 200-bet season. Units, records, and rules that survive it.
8 min read · Updated 2026-07-12Closing Line Value: The Fastest Honest Signal You're Betting Well
Win-loss records take a thousand-plus bets to prove anything. Closing line value is the faster, honest signal — what it is and how to track it.
8 min read · Updated 2026-07-12Kelly Criterion: How We Size Bets, and Why Full Kelly Is Dangerous
Full Kelly at a 55% edge still sizes bets big enough to hand you 65%+ bankroll swings. The math behind Kelly sizing, and why we bet a fraction of it.
9 min read · Updated 2026-07-12Original Data Analysis
Findings from our own database of 41,000+ games — not recycled folklore.
BABIP: How We Separate Luck From Skill in Baseball
Batting average on balls in play regresses toward the league mean. Here's how BABIP works, why hot streaks mislead, and how our model uses it.
8 min read · Updated 2026-07-12Home Advantage, Measured Across 41,000 Games
We measured home win rate and margin across four sports in our history database. College basketball's home edge is enormous; MLB's is nearly zero.
8 min read · Updated 2026-07-12How Accurate Are Betting Markets? We Checked 5,108 Closing Lines
We compared 5,108 NCAAB closing spreads to actual final margins. Markets are unbiased but noisy — and that noise is why the 52.38% bar is so hard to clear.
8 min read · Updated 2026-07-12MLB Park Factors, Measured: What 1,400 Games Say About Every Ballpark
We measured run scoring in all 30 MLB parks across the 2026 season. Coors isn't even the highest — here's what actually matters for totals bettors.
8 min read · Updated 2026-07-12Inside Our Model
Full transparency: how the SharpBetz model is built, tested, and audited.
Calibration: The Model Quality Metric Nobody Talks About
Accuracy tells you if a model is right. Calibration tells you if you can trust its confidence. We show both, using our own model's holdout numbers.
7 min read · Updated 2026-07-12We Rejected 4 of Our Last 5 Models. Here's Why That's the Point
In July 2026 we tested five model candidates against strict holdout gates. Four failed. Here's the process, the numbers, and why we're publishing the losses.
8 min read · Updated 2026-07-12Why Our Model Passes on Most Games (and Why That Makes It Trustworthy)
Our holdout data shows low-conviction picks lost 170 units while high-conviction picks won 208. So we cut volume — and turned totals off entirely.
7 min read · Updated 2026-07-12