Mariners vs Nationals Prediction 6/12/2026 Today’s MLB Picks

In this article we will formulate a Mariners vs Nationals prediction for this MLB game on Friday, June 12th at Nationals Park in Washington, DC. Let’s take a look at the prediction for this MLB matchup. 

Seattle Mariners Betting Preview

The Seattle Mariners are 36-34 this year after they split four games with the Orioles by scores of 6-3, 6-5, 2-7, and 5-7. In game four, Seattle cut the deficit from 6-1 to 6-5 in the fourth inning, but they couldn’t find the tying run in the loss. The Mariners recorded nine hits in the game and they were led by Raley, who went 1-4 with one home run and two RBIs. Woo allowed seven hits and seven earned runs over 5.0 innings for the loss, while Hoppe threw 1.2 innings in relief. Prior to that series, Seattle lost two out of three against the Tigers, but did win two out of three against the Mets before that. 

This season, Seattle has a 3.59 ERA with a 1.20 WHIP and a .241 opponent batting average, while they have scored 297 runs with a .237 batting average and a .318 on base percentage. Julio Rodriguez has led the Mariners with 13 home runs and 34 RBIs, while Luke Raley has added 14 home runs and 33 RBIs. The projected starting pitcher for Seattle is Bryce Miller, who is 2-0 with a 1.33 ERA and a 0.78 WHIP over 27.0 innings pitched this year. 

Washington Nationals Betting Preview

The Washington Nationals are 35-34 this season after they won two out of three against the Giants by scores of 4-3, 6-3, and 10-11. In game three, Washington led 9-1 in the eighth inning, but they allowed 10 runs in the last two innings for the loss. The Nationals recorded 14 hits in the game and they were led by Wood, who went 1-4 with one home run and two RBIs. Griffin allowed six hits and one earned run over 6.0 innings, while Parker picked up the loss in the ninth. Prior to that series, Washington won two out of three against the Diamondbacks, but lost all three against the Marlins before that. 

This season, Washington has a 4.66 ERA with a 1.39 WHIP and a .255 opponent batting average, while they have scored 372 runs with a .246 batting average and a .323 on base percentage. CJ Abrams has led the Nationals with 14 home runs and 51 RBIs, while James Wood has added 18 home runs and 43 RBIs. The projected starting pitcher for Washington is Zack Littell, who is 6-4 with a 4.76 ERA and a 1.31 WHIP over 64.1 innings pitched this season. 

Why the Washington Nationals will win

• The Nationals have won each of their last four games as underdogs following a road loss.
• The Mariners have lost four of their last six games as favorites against the Nationals following a loss.
• The Nationals have covered the run line in 13 of their last 14 games against AL West opponents following a road loss.
• The Mariners have failed to cover the run line each of their last five night games against NL East opponents that held a winning record.
• The Mariners have trailed after 5 innings in four of their last five night games at Nationals Park against National League opponents.
• The Mariners have trailed after 3 innings in four of their last five night games.

Why the Seattle Mariners will win

• The Mariners have won each of their last four night games against National League opponents.
• The Nationals have lost four of their last five home games against AL West opponents.
• The Nationals have failed to cover the run line in four of their last five home games against AL West opponents.
• The Mariners have covered the run line in four of their last five night games following a road loss.
• The Nationals have trailed after 5 innings in eight of their last 10 home games against AL West opponents.
• The Nationals have trailed after 3 innings in four of their last five home games against AL West opponents.

Total Runs Facts

• Each of the last four games between the Mariners and Nationals have gone OVER the total runs line.
• Twelve of the Mariners’ last 15 night games against NL East opponents have gone OVER the total runs line.
• The ‘Inning 1 UNDER 0.5 runs’ market has hit in 10 of the Mariners’ last 12 night games against National League opponents.
• The ‘Inning 1 UNDER 0.5 runs’ market has hit in five of the Nationals’ last six games as home underdogs against AL West opponents.

Washington Nationals Player Prop Facts

• Jacob Young has hit a home run in three of the Nationals’ last five games against AL opponents.
• Keibert Ruiz has recorded two or more hits in each of his last five home appearances after not playing the previous day.

Seattle Mariners Player Prop Facts

• Luke Raley has hit a home run in three of the Mariners’ last four games against opponents that held a winning record.
• Bryce Miller has recorded six or more strikeouts in three of his last four appearances with the Mariners as favorites.
• Victor Robles has recorded two hits in four of his last five road appearances against NL opponents.
• Bryce Miller has recorded a win in three of his last four road appearances against opponents that held a winning record.

Mariners vs Nationals Prediction 

Seattle comes into this matchup after losing their last two games to the Orioles and they have allowed 19 runs in their last three games. The Mariners are 17-18 on the road this year, while the Nationals are 12-20 at home. Washington has won three of their last five, but they had an epic collapse in their last game. The Nationals are starting Littell, who has allowed two earned runs or fewer in five straight outings, while Miller has also allowed two earned runs or fewer in five straight. Take the under here, as both pitchers are hot right now.

David Racey's Pick: Under 9.5