Marlins vs Nationals Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 31

Odds updated as of 8:12 a.m.

The Monday schedule in MLB includes a matchup between the Miami Marlins and the Washington Nationals.

Here's what you need to know before checking out today's MLB odds and spreads on FanDuel Sportsbook.

Marlins vs Nationals Game Info

• Miami Marlins (69-68) vs. Washington Nationals (65-74)
• Date: Monday, August 31, 2026
• Time: 6:45 p.m. ET
• Venue: Nationals Park -- Washington, District of Columbia
• Coverage: Fox Sports 1, Nationals.TV, and Marlins.TV

Marlins vs Nationals Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: MIA: (-112) | WSH: (+102)
• Spread: MIA: -1.5 (+146) | WSH: +1.5 (-176)
• Total: 8.5 -- Over: (-122) | Under: (+100)

Marlins vs Nationals Probable Starting Pitchers

Probable Pitchers: Ryan Gusto (Marlins) - 1-3, 3.98 ERA vs Will Dion (Nationals) - 1-1, 3.67 ERA

The Marlins will give the ball to Ryan Gusto (1-3, 3.98 ERA), who is eyeing win No. 2 on the season, and the Nationals will counter with Will Dion (1-1, 3.67 ERA). Gusto's team is 7-6-0 against the spread this season in his starts. Gusto's team is 2-2 this season when he starts and they are the moneyline favorite. Dion never pitched as a moneyline underdog a season ago.

Marlins vs Nationals Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Marlins win (50.4%)

Marlins vs Nationals Moneyline

• Miami is the favorite, -112 on the moneyline, while Washington is a +102 underdog despite being at home.

Marlins vs Nationals Spread

• The Nationals are hosting the Marlins, and are +1.5 on the runline. The Nationals are +146 to cover the spread, and the Marlins are -176.

Marlins vs Nationals Over/Under

• An over/under of 8.5 has been set for Marlins-Nationals on Aug. 31, with the over being -122 and the under +100.

Bet on Miami Marlins vs. Washington Nationals on FanDuel today!

Marlins vs Nationals Betting Trends

• The Marlins have come away with 38 wins in the 59 contests they have been listed as the favorites in this season.
• This season Miami has been victorious 37 times in 54 chances when named as a favorite of at least -112 on the moneyline.
• The Marlins' games have gone over the total in 65 of their 135 opportunities.
• The Marlins are 69-66-0 against the spread in their 135 games that had a posted line this season.
• The Nationals have been the moneyline underdog 104 total times this season. They've finished 46-58 in those games.
• Washington has a 37-52 record (winning 41.6% of its games) when playing as a moneyline underdog of +102 or longer.
• The Nationals have combined with opponents to hit the over on the total 69 times this season for a 69-61-5 record against the over/under.
• The Nationals have collected a 75-60-0 record against the spread this season (covering 55.6% of the time).

Marlins Player Leaders

• Otto Lopez leads Miami in slugging percentage (.444) and total hits (163) this season. He's batting .305 with an on-base percentage of .340.
• Among qualified hitters in the majors, he ranks fifth in batting average, 57th in on-base percentage, and 50th in slugging.
• Lopez hopes to build on a six-game hitting streak in this matchup. In his last 10 outings he is batting .275 with a double, a home run, three walks and seven RBIs.
• Xavier Edwards leads Miami with an OBP of .361 this season while batting .282 with 65 walks and 59 runs scored. He's slugging .376.
• Among all qualified, he is 21st in batting average, 29th in on-base percentage and 111th in slugging percentage.
• Javier Sanoja is batting .278 with a .417 slugging percentage and 51 RBI this year.
• Jakob Marsee is batting .208 with a .329 OBP and 31 RBI for Miami this season.

Nationals Player Leaders

• C.J. Abrams has put up a team-high .506 slugging percentage. He's batting .267 with an on-base percentage of .343.
• Including all qualified players in MLB, his batting average places him 50th, his on-base percentage ranks 49th, and he is 12th in slugging.
• Daylen Lile has 26 doubles, six triples, 18 home runs and 35 walks while batting .252. He's slugging .428 with an on-base percentage of .304.
• Including all qualifying hitters, he is 77th in batting average, 114th in on-base percentage and 62nd in slugging percentage.
• Jacob Young has 19 doubles, three triples, 10 home runs and 29 walks while batting .248.
• Keibert Ruiz has 22 doubles, nine home runs and 16 walks while batting .280.

Marlins vs Nationals Head to Head

• 8/30/2026: 6-2 MIA (Favorite: Nationals, Spread: -1.5, Total: 9.5, Favorite Moneyline: -118, Underdog Moneyline: +110)
• 8/29/2026: 5-4 WSH (Favorite: Marlins, Spread: -1.5, Total: 8, Favorite Moneyline: -108, Underdog Moneyline: +100)
• 8/28/2026: 9-2 WSH (Favorite: Marlins, Spread: -1.5, Total: 8.5, Favorite Moneyline: -134, Underdog Moneyline: +124)
• 8/23/2026: 6-2 MIA (Favorite: Marlins, Spread: -1.5, Total: 8.5, Favorite Moneyline: -158, Underdog Moneyline: +146)
• 8/22/2026: 4-2 MIA (Favorite: Marlins, Spread: -1.5, Total: 7.5, Favorite Moneyline: -180, Underdog Moneyline: +166)
• 8/21/2026: 3-2 MIA (Favorite: Marlins, Spread: -1.5, Total: 7.5, Favorite Moneyline: -146, Underdog Moneyline: +136)
• 6/3/2026: 4-1 MIA (Favorite: Nationals, Spread: -1.5, Total: 8, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 6/2/2026: 7-3 MIA (Favorite: Nationals, Spread: -1.5, Total: 9, Favorite Moneyline: -116, Underdog Moneyline: -102)
• 6/1/2026: 7-3 MIA (Favorite: Nationals, Spread: -1.5, Total: 8.5, Favorite Moneyline: -138, Underdog Moneyline: +118)
• 5/10/2026: 5-2 MIA (Favorite: Marlins, Spread: -1.5, Total: 8.5, Favorite Moneyline: -130, Underdog Moneyline: +110)

Sign up for FanDuel Sportsbook and FanDuel Daily Fantasy today!