Friday MLB Parlays: Best Parlay Picks for July 31, 2026

Friday Major League Baseball Parlay Picks - July 31, 2026

Fourteen Major League Baseball games are on the board this Friday, and the odds market is loaded with opportunity. From afternoon action in Chicago to late West Coast finishes in Seattle and Los Angeles, there's plenty of value to mine. We've broken down the slate and identified three parlay combinations that balance risk, reward, and genuine edge. Let's get into it.

Reading the Friday Slate

With 14 games on the card, tonight's slate is one of the biggest of the season. A few themes stand out: pitching-friendly totals in the 7.5-8 range for several matchups, some clear underdog value on the moneyline, and run-line spreads that are offering surprisingly generous payouts in games where one side has a clear edge. We're mixing moneylines and totals to build parlays that complement each other and avoid over-concentration on any single game outcome.

Parlay 1 - The Value Hunter (3 Legs)

This parlay targets genuine underdog value and a low-total pitcher's duel to build a compelling payout.

Pittsburgh Pirates ML (-127, BetRivers): The Pirates travel to Cincinnati as slight road favourites, and the market is pricing this accurately. Pittsburgh has been the more consistent club and against a Reds side that has struggled to generate consistent offence, the Pirates ML represents real value at near-even money. At -127, BetRivers is the sharpest price available.
St. Louis Cardinals ML (+155, Bally Bet): The Cardinals are a significant underdog visiting Toronto, priced at +155 on Bally Bet - that's an implied probability of just over 39%. Toronto are favourites, yes, but at -169 on the moneyline they're extremely expensive. St. Louis at +155 is a genuine value flag - this is one of the most generous underdog prices on the board tonight, and in a low-variance sport like baseball, that kind of number demands attention.
Pittsburgh Pirates @ Cincinnati Reds - Under 7.5 (+100, theScore Bet): Getting plus money on the under in a game where both rotations are capable of keeping runs off the board is exactly the kind of edge we look for. theScore Bet is offering +100 on the under 7.5 - essentially even money for what projects as a tight, low-scoring contest. This complements the Pirates ML leg perfectly.

Parlay 1 Combined Odds: Approximately +535

Parlay 2 - The Pitchers' Duel Double (2 Legs)

This two-legger is cleaner and tighter, focusing on two games with strong under signals and value pricing.

Texas Rangers @ Houston Astros - Under 8 (-108, FanDuel): An Astros-Rangers game at Minute Maid Park sets up as a classic pitching duel. The total of 8 is set at a level that looks right, and FanDuel's -108 on the under is the sharpest price available. Both clubs have quality rotation depth and this rivalry often produces tense, low-scoring affairs. The under here is a strong standalone play and an even better parlay anchor.
Minnesota Twins @ Seattle Mariners - Under 8 (-115, BetMGM): The Mariners' home park - T-Mobile Park - is one of the most pitcher-friendly venues in baseball. The Twins are visiting a Seattle rotation that is built to suppress offence. An 8-run total feels generous for this environment, and BetMGM's -115 on the under is the best available. Two unders in pitcher-friendly environments make for a solid two-leg parlay.

Parlay 2 Combined Odds: Approximately +218

Parlay 3 - The Big-Payout Accumulator (3 Legs)

This three-legger takes on more risk in exchange for a bigger potential payout, combining a run-line value, a strong favourite, and an underdog with real merit.

Milwaukee Brewers -1.5 (+100, Bally Bet): Getting the Brewers on the run line at even money is excellent value. Milwaukee are -161 favourites on the moneyline visiting the Angels, and taking the -1.5 spread at +100 on Bally Bet gives you a significantly better payout for what is a very capable side against one of the weaker teams in the American League. Even money for a team this heavily favoured to win by multiple runs is a true value flag.
Detroit Tigers -1.5 (+100, Bally Bet): Another run-line bet at even money, this time the Tigers visiting Oakland. Detroit are -154 on the moneyline, so taking -1.5 at +100 from Bally Bet is a massive overlay. Against an Athletics side still building, Detroit should have the firepower to cover this spread. Two run lines at even money in the same parlay doubles the potential upside significantly.
New York Mets ML (-125, Hard Rock Bet): The Mets host the Marlins and are comfortable home favourites. Miami are one of the weakest offensive clubs in the National League and New York at -125 on Hard Rock Bet is a solid anchor for this leg. The Mets have the pitching and lineup depth to take care of business at home, and this leg keeps the parlay grounded while the two run-line legs provide the upside.

Parlay 3 Combined Odds: Approximately +311

Best Value Flag of the Night

The single biggest value flag on tonight's board is St. Louis Cardinals +155 (Bally Bet) against Toronto. The Blue Jays are -169 favourites - a significant price - but road underdogs at +155 in a relatively evenly-matched National League vs American League interleague spot hit in baseball far more often than the 39% implied probability suggests. This is the kind of price that sharp bettors circulate. Even as a standalone bet, the Cardinals at +155 deserve a look.

Tonight's Best Bets Summary

Parlay 1: Pirates ML + Cardinals ML + Pirates/Reds Under 7.5 - approx. +535 (BetRivers / Bally Bet / theScore Bet)
Parlay 2: Rangers/Astros Under 8 + Twins/Mariners Under 8 - approx. +218 (FanDuel / BetMGM)
Parlay 3: Brewers -1.5 + Tigers -1.5 + Mets ML - approx. +311 (Bally Bet / Bally Bet / Hard Rock Bet)

Good luck on the Friday Major League Baseball slate - it's a deep card with real value scattered across it. Shop your lines and lock in the best available prices before first pitch.

Please gamble responsibly - set a budget before you bet and never wager more than you can afford to lose.