Marlins vs Nationals Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 21

Odds updated as of 2:12 a.m.

The MLB's Friday slate includes the Miami Marlins taking on the Washington Nationals.

We've got you covered, in terms of the most important information about this game before you take a look at the MLB odds and spreads on FanDuel Sportsbook.

Marlins vs Nationals Game Info

• Miami Marlins (64-64) vs. Washington Nationals (61-68)
• Date: Friday, August 21, 2026
• Time: 7:10 p.m. ET
• Venue: loanDepot park -- Miami, Florida
• Coverage: Marlins.TV and Nationals.TV

Marlins vs Nationals Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: MIA: (-156) | WSH: (+132)
• Spread: MIA: -1.5 (+138) | WSH: +1.5 (-166)
• Total: 8.5 -- Over: (+102) | Under: (-124)

Marlins vs Nationals Probable Starting Pitchers

Probable Pitchers: Ryan Gusto (Marlins) - 0-3, 4.70 ERA vs Brad Lord (Nationals) - 5-2, 4.04 ERA

This contest's pitching matchup is set, as the Marlins will send Ryan Gusto (0-3) to the mound, while Brad Lord (5-2) will answer the bell for the Nationals. When Gusto starts, his team is 6-5-0 against the spread this season. Gusto's team has won 33.3% of his starts when they are favored on the moneyline (1-2). The Nationals covered all of Lord's three starts that had a set spread. The Nationals were named the moneyline underdog for two Lord starts this season -- they split the games.

Marlins vs Nationals Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Marlins win (61.9%)

Marlins vs Nationals Moneyline

• Washington is the underdog, +132 on the moneyline, while Miami is a -156 favorite at home.

Marlins vs Nationals Spread

• The Nationals are at the Marlins, and are +1.5 on the runline. The Nationals are +138 to cover the spread, and the Marlins are -166.

Marlins vs Nationals Over/Under

• Marlins versus Nationals, on Aug. 21, has an over/under of 8.5, with the over being +102 and the under -124.

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

Marlins vs Nationals Betting Trends

• The Marlins have been victorious in 35, or 64.8%, of the 54 contests they have been chosen as favorites in this season.
• This season Miami has been victorious five times in six chances when named as a favorite of at least -156 on the moneyline.
• The Marlins and their opponents have hit the over in 62 of their 126 games with a total set by oddsmakers this season.
• The Marlins have an against the spread mark of 65-61-0 in 126 games with a line this season.
• The Nationals have won 44 of the 99 games they were the moneyline underdog this season (44.4%).
• Washington has a 16-26 record (winning just 38.1% of its games) when it has played as a moneyline underdog of +132 or longer.
• The Nationals have had an over/under set by oddsmakers 125 times, and have combined with opponents to go over the total in 65 of those games (65-55-5).
• The Nationals have collected a 70-55-0 record against the spread this season (covering 56% of the time).

Marlins Player Leaders

• Otto Lopez leads Miami in slugging percentage (.449) thanks to 45 extra-base hits. He has a .308 batting average and an on-base percentage of .344.
• Among the qualified hitters in MLB, his batting average ranks fifth, his on-base percentage ranks 54th, and he is 47th in slugging.
• Xavier Edwards leads Miami with an OBP of .367 this season while batting .288 with 62 walks and 59 runs scored. He's slugging .386.
• He is 15th in batting average, 20th in on-base percentage and 110th in slugging among qualified hitters.
• Edwards takes a six-game streak with at least one hit into this matchup. In his last 10 games he is hitting .297 with five walks and three RBIs.
• Javier Sanoja has 91 hits this season and has a slash line of .278/.317/.425.
• Sanoja heads into this game with four games in a row with at least one hit. In his last five games he is hitting .412 with a double, two home runs, a walk and six RBIs.
• Jakob Marsee has been key for Miami with 84 hits, an OBP of .322 plus a slugging percentage of .311.

Nationals Player Leaders

• CJ Abrams has a team-best .530 slugging percentage. He's batting .279 with an on-base percentage of .354.
• Including all qualified hitters in the big leagues, his batting average puts him 28th, his on-base percentage ranks 41st, and he is 11th in slugging.
• Daylen Lile is hitting .241 with 23 doubles, five triples, 15 home runs and 29 walks. He's slugging .401 with an on-base percentage of .290.
• His batting average is 100th among all qualified players, his on-base percentage is 131st, and he is 97th in slugging.
• Jacob Young is batting .250 with 16 doubles, three triples, 10 home runs and 25 walks.
• Keibert Ruiz is batting .276 with 21 doubles, seven home runs and 14 walks.

Marlins vs Nationals Head to Head

• 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)
• 5/9/2026: 8-7 MIA (Favorite: Marlins, Spread: -1.5, Total: 8.5, Favorite Moneyline: -164, Underdog Moneyline: +138)
• 5/8/2026: 3-2 WSH (Favorite: Marlins, Spread: -1.5, Total: 8.5, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 9/11/2025: 5-0 MIA (Favorite: Marlins, Spread: -1.5, Total: 8, Favorite Moneyline: -126, Underdog Moneyline: +108)
• 9/10/2025: 8-3 MIA (Favorite: Marlins, Spread: -1.5, Total: 8.5, Favorite Moneyline: -156, Underdog Moneyline: +132)
• 9/9/2025: 7-5 WSH (Favorite: Marlins, Spread: -1.5, Total: 9, Favorite Moneyline: -122, Underdog Moneyline: +104)
• 9/8/2025: 15-7 WSH (Favorite: Marlins, Spread: -1.5, Total: 8.5, Favorite Moneyline: -132, Underdog Moneyline: +112)

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