Best betting promos and sportsbooks for MLB prop bets [May 15, 2026]

May 15, 2026 - 15:15

The Washington Nationals have a great opportunity to chip away at Atlanta’s lead with a favorable matchup against the Baltimore Orioles.

After a productive offseason, the Washington Nationals have been able to turn into a competitive unit, crawling into the top half of the board in most offensive metrics.

Luckily for the Nationals, they will have the opportunity to thrive against the Baltimore Orioles as they battle it out against Shane Baz who struggles with keeping opposing runners out of scoring position.

With fifteen games taking place on Friday night, there are plenty of prop bets and markets to wager on which you can read a detailed breakdown of them below.

Best betting promos and sportsbooks for MLB prop bets

Find the best promos and sportsbooks to use for today’s MLB prop bets.

Baltimore Orioles vs Washington Nationals (6:45pm, EST)

Shane Baz Over 5.5 Hits Allowed (-109) at Caesars Sportsbook

Since the start of the regular season, the Washington Nationals have been able to play at a very high level, starting a lineup who ranks in the top-10 in Hit Rate, On Base Percentage, and in OPS.

Their resurgence on offense helps drastically reduce the amount of negative variance in their contests, making it easier for them to pull away on the scoreboard.

In a favorable matchup against the Baltimore Orioles, expect the Nationals to build on their momentum as they face off against Shane Baz who is currently averaging an ERA of 5.48 and a WHIP of 1.556 while generating over one Hit Against per inning.

Especially with his back end widening the width of the Nationals gaps in the outfield, surrounding Baz with a group who ranks near dead last in Defensive Efficiency.

Shane Baz Under 18.5 Total Outs (-175) at BetMGM Sportsbook

With the Nationals stringing together their Hits from the opening pitch, the length of Baz’s leash on the mound will drastically shrink, increasing his chances of being pulled early on in his start which will keep him under the total on his Outs prop.

If the total on Baz’s Outs prop crosses through the key number of 18.5 before you are able to place a bet, then reduce the size of your wager.

New York Yankees vs New York Mets (7:15pm, EST)

Cam Schlittler Over 6.5 Strikeouts (+105) at BetMGM Sportsbook

With Tarik Skubal dealing with an injury, Cam Schlittler is now listed as the new betting favorite to win the AL Cy Young award after kicking off his year with an ERA of 1.35 and a FIP of 1.64.

Schlittler’s success on the mound stems from his controlled aggression, generating less than one Hit Against and more than one Strikeout per Inning Pitched.

Heading into Friday night’s contest against the New York Mets, expect Schlittler to continue to create Whiffs at a blistering fast pace by exploiting a lineup who resides near the bottom of the board in Contact Rate, Walk Rate, and in On Base Percentage.

For some more exposure, escalator bet Schlittler’s Strikeout prop by placing smaller wagers on his alternate overs at the best available odds across multiple sportsbooks.

Luis Torrens Under 0.5 Hit (-106) at FanDuel Sportsbook

Luis Torrens drop off in production has plagued the Mets offense, generating less than one Hit per game and a .567 OPS.

With Schlittler in full control of his command while aggressively attacking the strike zone, expect Torrens to continue to struggle to barrel up the ball and be held without a Hit against the AL Cy Young contender.

San Diego Padres vs Seattle Mariners (9:40pm, EST)

Seattle Mariners Team Total Under 3.5 (-110) at BetMGM Sportsbook

After struggling to break .500 the past two weeks, the Seattle Mariners have trickled down the AL West division standings, sitting two games back from the Athletics for first.

Their lack of production on offense holds them back from being a well rounded unit, ranking below league average in Hit Rate, RBIs, Runs Scored, and in On Base Percentage.

Unfortunately for the Mariners, their struggles on offense are poised to persist against the San Diego Padres as they face off against Randy Vasquez who is averaging an ERA of 3.05 and a WHIP of 1.173.

Especially with the Padres back end lowering the probability of Vasquez getting burned by an error to help keep them off the scoreboard, fielding a group who leads the league in Fielding Percentage.

About the author

Kody Malstrom

Kody Malstrom is a professional sports bettor and sports betting journalist with six years of experience covering a vast majority of sports. He covers football, basketball, hockey, baseball, and the UFC in written and video form.

Born and raised in Michigan, Kody is a Detroit sports fan who spends all of his Sundays in the fall rooting for the Detroit Lions and Saturdays watching as much College Football as possible. In the winter, he shifts his focus to the Detroit Red Wings and Pistons while simultaneously rooting for his North Carolina Tar Heels.

When he is not staring at betting markets, you can find Kody at the beach or snowboarding down a mountain, depending on the time of the year.

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