Orioles vs Nationals Prediction, Odds, Moneyline, Spread & Over/Under for May 15

Odds updated as of 6:11 p.m.

MLB action on Friday includes the Baltimore Orioles taking on the Washington Nationals.

All the information you need to make smart bets on this matchup at FanDuel Sportsbook can be found below. Check out all of the latest MLB betting lines here.

Orioles vs Nationals Game Info

• Baltimore Orioles (20-24) vs. Washington Nationals (21-23)
• Date: Friday, May 15, 2026
• Time: 6:45 p.m. ET
• Venue: Nationals Park -- Washington, District of Columbia
• Coverage: Nationals.TV and MASN

Orioles vs Nationals Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: BAL: (-138) | WSH: (+118)
• Spread: BAL: -1.5 (+118) | WSH: +1.5 (-142)
• Total: 9.5 -- Over: (-104) | Under: (-118)

Orioles vs Nationals Probable Starting Pitchers

Probable Pitchers: Shane Baz (Orioles) - 1-4, 5.48 ERA vs Zack Littell (Nationals) - 1-4, 6.94 ERA

The Orioles will call on Shane Baz (1-4) against the Nationals and Zack Littell (1-4). Baz's team is 3-5-0 against the spread this season in his starts. Baz's team is 2-2 this season when he starts and they are the moneyline favorite. The Nationals are 2-3-0 against the spread when Littell starts. The Nationals have a 2-3 record in Littell's five starts this season when they were the underdog on the moneyline.

Orioles vs Nationals Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Nationals win (52.2%)

Orioles vs Nationals Moneyline

• Baltimore is the favorite, -138 on the moneyline, while Washington is a +118 underdog despite being at home.

Orioles vs Nationals Spread

• The Nationals are +1.5 on the spread (-142 to cover), and Baltimore is +118 to cover the runline.

Orioles vs Nationals Over/Under

• The over/under for Orioles-Nationals on May 15 is 9.5. The over is -104, and the under is -118.

Bet on Baltimore Orioles vs. Washington Nationals on FanDuel today!

Orioles vs Nationals Betting Trends

• The Orioles have been victorious in 12, or 52.2%, of the 23 contests they have been chosen as favorites in this season.
• Baltimore has a record of 5-5 when favored by -138 or more this year.
• Contests with the Orioles have gone over the total set by bookmakers in 26 of 44 chances this season.
• The Orioles have an against the spread record of 20-24-0 in 44 games with a line this season.
• The Nationals have put together a 20-22 record in games they were the underdog on the moneyline (winning 47.6% of those games).
• In games it has played as a moneyline underdog with odds of +118 or longer, Washington has a 16-15 record (winning 51.6% of its games).
• In the 44 games oddsmakers have set an over/under for the Nationals, they have combined with opponents to go over the total 28 times (28-14-2).
• The Nationals have a 25-19-0 record against the spread this season (covering 56.8% of the time).

Orioles Player Leaders

• Taylor Ward leads Baltimore OPS (.803) this season. He has a .265 batting average, an on-base percentage of .426, and a slugging percentage of .377.
• Among qualified batters in MLB, he is 61st in batting average, third in on-base percentage, and 106th in slugging.
• Ward hopes to build on a two-game hitting streak in this matchup. During his last five outings he is hitting .214 with a double and seven walks.
• Pete Alonso has 36 hits, which leads Baltimore batters this season. He's batting .218 with 18 extra-base hits. He's also slugging .424 with an on-base percentage of .310.
• He is 131st in batting average, 118th in on-base percentage and 66th in slugging among qualified hitters.
• Alonso heads into this matchup looking to extend his two-game hit streak. In his last five games he is hitting .158 with an RBI.
• Adley Rutschman is batting .291 with a .553 slugging percentage and 24 RBI this year.
• Gunnar Henderson is batting .197 with a .253 OBP and 21 RBI for Baltimore this season.

Nationals Player Leaders

• C.J. Abrams has accumulated a team-best OBP (.390) and slugging percentage (.532), and paces the Nationals in hits (45, while batting .292).
• Including all the qualified players in the majors, his batting average places him 31st, his on-base percentage is 13th, and he is 13th in slugging.
• James Wood is batting .234 with 11 doubles, 12 home runs and 37 walks. He's slugging .515 with an on-base percentage of .382.
• His batting average ranks 107th among all qualified players, his on-base percentage is 21st, and he is 19th in slugging.
• Daylen Lile has a .433 slugging percentage, which paces the Nationals.
• Luis Garcia has eight doubles, two triples, three home runs and six walks while batting .276.

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