We graded 4 leg Parlay at +18377 on FanDuel — a 4-leg ticket by comparing the offered price to a vig-free consensus of the wider market. The ticket centers on Cal Raleigh, Kyle Schwarber, Shohei Ohtani and others. The bet earned a F grade (39/100), which we label "Better Off Passing".

The headline number is edge versus fair: -2.20%. That figure is the long-run expected return per dollar staked, assuming the market consensus is an unbiased estimate of true probability. At odds this long, even a strongly positive edge cashes infrequently — single-bet variance dominates short samples. Because we couldn't fully match this market across other books, fair value here was derived from the host book's own posted line — treat the edge as directional rather than precise.

Fair odds represent the price you'd see in a perfectly efficient, zero-margin market. To compute them we pull current prices from the available sportsbooks on the same market, strip out each book's vig, and average the resulting no-vig probabilities. The averaged probability for this outcome lands at 0.5%, which converts to fair odds of +18793.

Compared to the offered price of +18377 (a +0.0% move from the original line), that produces an edge of -2.20%. In plain English: if the market is right about the true probability, you'd expect to lose about 2.2 cents on every dollar staked, on average, across many bets of this exact shape.

Across AiOddsLab's database, we've scored 337 graded MLB bets, 13.0% hit rate on settled tickets, average edge of +324.89%, average rating 47/100. That sample gives a baseline expectation for what a "fair" hit rate looks like in this sport — use it to sanity-check your own bankroll math.

Narrowing to the same market type, 179 graded parlay tickets, 0.0% hit rate on settled tickets, average edge of +579.93%, average rating 48/100. This is the closest apples-to-apples reference for the bet you're looking at.

Filtering by odds range alone (longshots (+1500 and up)), 146 graded tickets, 0.0% hit rate on settled tickets, average edge of +29.11%, average rating 45/100.

In the trailing 90 days, 337 graded MLB bets, 13.0% hit rate on settled tickets, average edge of +324.89%, average rating 47/100. Compare that to the all-time baseline above to see whether grading and outcomes have drifted recently.

Stats update as new tickets are analyzed and graded. Sample sizes below 5 are suppressed.

The wider market is pricing this outcome tighter than FanDuel's line suggests is reasonable. With an edge of -2.2%, you're paying a premium versus the consensus fair price of +18793. The bet can still win — odds are not destiny — but the price embeds a built-in disadvantage that compounds across repeated wagers. Shopping the same market at a sharper book, or waiting for the line to move, is usually the correct response.