MLB parlays: A step-by-step guide to Dimers' best bets

September baseball means every game carries playoff-race weight, and MLB's daily slate, often more than 10 games, gives Dimers' model plenty of room to find spreads the sportsbooks haven't priced correctly. The MLB Best Bets tool runs every matchup through that model, flags the games where its edge over the market is biggest and lets you filter down to just the bet type you want.

Here's how to turn that into an actual MLB parlay, step by step.

Step 1: Go to the MLB section on Dimers

Start on Dimers' MLB predictions, where every game on the day's slate gets its own model-generated line, win probability and recommended play.

Step 2: Select "Best Bets"

From the MLB hub, click into "Best Bets" to pull up every edge the model has flagged across the day's games, ranked and ready to filter.

Step 3: Filter for "Spread" bets only

Open the Filter panel and narrow the list down to spread bets specifically. In baseball this market is commonly called the "run line," but on Dimers it's filed under the same "Spread" checkbox used across sports. That's confirmed directly from the filter panel, which lists Spread, Over/Under, Moneyline and Other as the bet-type options.

You can choose any market, but for this example we're going to focus on the games spread as that's where our model is often at its best.

Isolating this run line market keeps every leg of your parlay structured the same way (a team either covers its run line or it doesn't) rather than mixing in totals or moneylines.

Step 4: Sort by "Game Time (earliest–latest)"

With the bet type narrowed down, sort the results chronologically so you can see which games lock first.

Sorting this way isn't just tidy—it matters for parlay construction. If you're building a same-day parlay, you want to know which games to target so you're not left trying to track four different start times across the country.

Step 5: Assess the model's findings and assemble your parlay

A few things stand out here, starting with what's missing. Unlike the past couple of slates, none of today's four legs clear Dimers' threshold for a "High Edge" tag. That doesn't mean there's no value on the board, just that the gaps between the model and the market are tighter across the board today.

Mets +1.5 carries the largest edge of the four at 4.7%, with the model giving New York a 61.2% shot to cover against Tampa Bay, compared with a 57-cent prediction markets price that puts the market's own implied probability at 57%. Cubs +1.5 is close behind at a 4.6% edge, with a 58.5% model probability against a 54-cent price.

Athletics +1.5 and Royals +1.5 round out the group with smaller edges, 2.4% and 2.2% respectively. Royals is the thinnest of the four: the model likes Kansas City to cover at 65.2%, but the market's 63-cent price already implies a 63% chance, leaving less daylight between the model and the price than any other leg today.

One note before the parlay math: today's best odds are quoted in cents rather than the typical plus/minus format, a pricing style common on predictions markets such as Polymarket and Kalshi where the price paid roughly equals the market's own implied probability (a 63-cent price implies a 63% chance). The figures below convert that to the more familiar American odds format so it stays comparable to previous days.

Combine all four legs and here's what you're looking at:

• Combined odds: approximately +774 in American-odds terms, using the best available price on each leg (pulled from cents-based pricing rather than a single moneyline book)

On a $10 stake, +774 would return a profit of roughly $77.40 (a total payout near $87.40) if every leg hits.

It's worth being clear-eyed about what a four-leg parlay actually is, though: every leg has to land for the ticket to pay out, so even a slate of positive-edge bets carries real variance once they're chained together. Cubs and Mets, with the thinnest win probabilities of the group, are the legs most likely to be the difference between a full payout and nothing.

Bettors who want to de-risk this same slate could always split it into two two-leg parlays, or bet the legs straight, rather than needing all four to land.

A quick note before you bet

Odds and lines move constantly—the numbers in this walkthrough are a snapshot from the moment the bets were identified, so double-check the live picks on Dimers before placing anything. And as with any parlay, bet within your means and gamble responsibly: stacking legs increases potential payout, but it increases the chance of losing the whole ticket even more.