Giants vs Nationals Prediction, Odds, Moneyline, Spread & Over/Under for April 18

Odds updated as of 2:12 a.m.

The San Francisco Giants are among the MLB teams in action on Saturday, up against the Washington Nationals.

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

Giants vs Nationals Game Info

• San Francisco Giants (8-12) vs. Washington Nationals (9-11)
• Date: Saturday, April 18, 2026
• Time: 4:05 p.m. ET
• Venue: Nationals Park -- Washington, District of Columbia
• Coverage: Nationals.TV and NBCS-BA

Giants vs Nationals Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SF: (-118) | WSH: (+100)
• Spread: SF: -1.5 (+136) | WSH: +1.5 (-164)
• Total: 9.5 -- Over: (-110) | Under: (-110)

Giants vs Nationals Probable Starting Pitchers

Probable Pitchers: Adrian Houser (Giants) - 0-2, 5.06 ERA vs Cade Cavalli (Nationals) - 0-1, 4.60 ERA

The Giants will give the nod to Adrian Houser (0-2) versus the Nationals and Cade Cavalli (0-1). Houser's team has not covered in any of his three starts with a spread this season. This will be Houser's first start this season with his team as the moneyline favorite. The Nationals have gone 3-1-0 against the spread when Cavalli starts. The Nationals are 1-2 in Cavalli's three starts this season that they were the moneyline underdog.

Giants vs Nationals Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Giants win (53.1%)

Giants vs Nationals Moneyline

• Looking at the moneyline for Nationals-Giants, Washington is the underdog at +100, and San Francisco is -118 playing on the road.

Giants vs Nationals Spread

• The Nationals are +1.5 on the run line against the Giants. The Nationals are -164 to cover, and the Giants are +136.

Giants vs Nationals Over/Under

• The over/under for Giants-Nationals on April 18 is 9.5. The over is -110, and the under is -110.

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Giants vs Nationals Betting Trends

• The Giants have been favorites in six games this season and have come away with the win two times (33.3%) in those contests.
• San Francisco has a record of 2-2 when favored by -118 or more this year.
• The Giants and their opponents have gone over the total this season in nine of their 20 opportunities.
• The Giants are 7-13-0 against the spread in their 20 games with a line set by sportsbooks this season.
• The Nationals have been the underdog on the moneyline 19 total times this season. They've finished 9-10 in those games.
• Washington has gone 8-10 in games it has played as a moneyline underdog with odds of +100 or longer (44.4%).
• The Nationals have played in 20 games with an over/under set, and have combined with opponents to go over the total 14 times (14-6-0).
• The Nationals have a 12-8-0 record against the spread this season (covering 60% of the time).

Giants Player Leaders

• Luis Arraez leads San Francisco OPS (.743) this season. He has a .319 batting average, an on-base percentage of .354, and a slugging percentage of .389.
• He ranks 13th in batting average, 56th in on-base percentage, and 91st in slugging among qualifying hitters in the majors.
• Matt Chapman has an OPS of .738, fueled by an OBP of .333 and a team-best slugging percentage of .405 this season. He's batting .291.
• Among qualified batters, he is 36th in batting average, 88th in on-base percentage and 86th in slugging percentage.
• Chapman enters this game looking to extend his three-game hit streak. In his last five games he is batting .238 with a double and four RBIs.
• Willy Adames has 21 hits and is batting .269 this season.
• Adames heads into this game with two games in a row with at least one hit. In his last five games he is batting .300 with two doubles, a home run and an RBI.
• Jung Hoo Lee has been key for San Francisco with 17 hits, an OBP of .308 plus a slugging percentage of .377.
• Lee has hit safely in four games in a row. In his last five games he is batting .368 with two doubles, two walks and an RBI.

Nationals Player Leaders

• C.J. Abrams has racked up an on-base percentage of .469, a slugging percentage of .682, and has 24 hits, all club-highs for the Nationals (while batting .364).
• Including all qualifying hitters, he ranks third in batting average, while his on-base percentage ranks second and he is fifth in slugging.
• Abrams hopes to build on an eight-game hitting streak in this matchup. During his last 10 outings he is batting .452 with three doubles, two home runs, four walks and six RBIs.
• James Wood is batting .253 with six doubles, six home runs and 14 walks. He's slugging .542 with an on-base percentage of .367.
• Including all qualifying hitters, his batting average places him 83rd, his on-base percentage is 44th, and he is 25th in slugging.
• Daylen Lile has racked up a slugging percentage of .372, a team-best for the Nationals.
• Luis Garcia is batting .226 with three doubles, a triple, a home run and four walks.

Giants vs Nationals Head to Head

• 4/17/2026: 10-5 SF (Favorite: Giants, Spread: -1.5, Total: 8.5, Favorite Moneyline: -154, Underdog Moneyline: +130)
• 8/10/2025: 8-0 WSH (Favorite: Giants, Spread: -1.5, Total: 8, Favorite Moneyline: -158, Underdog Moneyline: +134)
• 8/9/2025: 4-2 WSH (Favorite: Giants, Spread: -1.5, Total: 8, Favorite Moneyline: -166, Underdog Moneyline: +140)
• 8/8/2025: 5-0 SF (Favorite: Giants, Spread: -1.5, Total: 8.5, Favorite Moneyline: -168, Underdog Moneyline: +142)
• 5/25/2025: 3-2 SF (Favorite: Giants, Spread: -1.5, Total: 8, Favorite Moneyline: -162, Underdog Moneyline: +136)
• 5/24/2025: 3-0 WSH (Favorite: Giants, Spread: -1.5, Total: 8.5, Favorite Moneyline: -158, Underdog Moneyline: +134)
• 5/23/2025: 4-0 SF (Favorite: Nationals, Spread: -1.5, Total: 8, Favorite Moneyline: -112, Underdog Moneyline: -104)
• 8/8/2024: 9-5 SF (Favorite: Giants, Spread: -1.5, Total: 8.5, Favorite Moneyline: -120, Underdog Moneyline: +102)
• 8/7/2024: 7-4 SF (Favorite: Giants, Spread: -1.5, Total: 7.5, Favorite Moneyline: -158, Underdog Moneyline: +134)
• 8/6/2024: 11-5 WSH (Favorite: Giants, Spread: -1.5, Total: 9, Favorite Moneyline: -118, Underdog Moneyline: -100)

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