Seattle Mariners vs Washington Nationals Prediction, 6/12/2026 MLB Picks, Best Bets & Odds

Game: Seattle Mariners vs Washington Nationals

Date: Friday, June 12, 2026

Location: Nationals Park in Washington, D.C.

TV: Nationals.TV

Odds/Point Spread: Seattle (-182) Washington (+150)

The Seattle Mariners (36-32) are on their way to Nationals Park on Friday where they will attempt to defeat the Washington Nationals (35-33). The moneyline on this game has the Mariners at -182 while the Nationals are sitting at +150. The over/under comes in at 8.5. The pitchers who are expected to start are Bryce Miller and Zack Littell.

As a team, the Seattle Mariners are recording 4.3 runs per outing, which ranks them 20th in the league. They have accounted for 290 runs while holding a team OBP of .319. The Mariners have tallied 94 doubles as a squad and have knocked 87 baseballs out of the park. They have 283 runs batted in as well as 541 hits over the course of the season, while their batting average comes in at .238. Seattle has a slugging rate of .399 and have struck out 588 times, while being walked on 233 occasions.

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They have a strikeout to walk ratio of 3.31 and their pitching staff has a collective WHIP of 1.18. Mariners pitchers have allowed 63 home runs in addition to 257 runs in total (6th in baseball). Seattle has given up 543 base hits (8.0 per 9 innings) in addition to 235 earned runs. The Mariners are sitting with a team ERA of 3.48 so far this year (5th in MLB), and their staff has rung up 585 hitters. Their pitching staff has walked 177 players from the other team and their FIP sits at 3.58 as a team on the season.

Mariners relief pitchers have entered the contest with players on base 53 times and also have had 85 appearances in high leverage situations. The bullpen have tallied 40 holds this year (12th in baseball). The Mariners relievers have a save percentage of 55.2% and have entered the game in 70 save situations. They have recorded 16 saves on the year and have missed out on 13 of their 29 chances to save the game. The relievers have inherited 69 base runners so far this season with 18.8% of them crossing the plate. The Mariners have sent 210 relievers to the hill on the year.

The Mariners have converted 69.9% of baseballs in play into outs out of 5,472 innings, which has them ranked 17th in MLB. The Seattle Mariners have amassed 1,824 putouts so far this season, as well as 561 assists and 29 errors. Their fielding rate is holding at .988 which is 8th in the majors, and have accumulated 62 double plays.

Miller (26-21 win-loss mark in his career) holds a FIP of 3.78 and he has gone up against 1,732 opposing hitters in the majors. He has surrendered 364 base hits (7.6 hits per nine innings) and has 110 walks. His earned run average is 3.84 (183 earned runs allowed) and his WHIP is 1.105. Miller has taken the mound for 429 innings and is sitting with 393 K's so far in his MLB career.

The Nationals have a team SLG% of .417 and they tally 5.32 runs per contest (3rd in the league). They have put up 119 two-baggers, while taking a walk 242 times and racking up 362 runs. Washington has tallied 87 home runs on the year to go along with 342 RBIs. They have been called out on strikes on 565 occasions (14th in the league) and have a total of 568 hits. The Washington Nationals have an OBP of .322 and a team batting average of .244 so far this season.

The Nationals hold a team WHIP of 1.381 with a FIP of 4.79 as a unit on the season. They are currently ranked 28th in the league as a staff in total hits relinquished with 598. The Washington pitching staff have allowed 354 runs for the year while holding a team ERA of 4.56 (311 earned runs allowed). They currently have a strikeout to walk ratio of 7.80 (530 strikeouts against 249 walks). They have conceded 94 dingers and they surrender 5.20 runs per 9 innings (27th in the league).

Washington bullpen pitchers hold an inherited score percentage of 42.9% of 98 inherited base runners. Their relief pitchers have stepped onto the hill 77 times in high leverage situations and on 67 occasions with runners on. With 76 save situations, the Nationals have accrued 34 holds and 17 blown saves. They sit at 24th in MLB with a save percentage of 55.3%, and they have sent 219 relievers onto the diamond this year.

In their 5,523 innings played, the Nationals have accumulated a defensive efficiency of 69.6% (19th in baseball). The Washington Nationals have turned 51 double plays and own a fielding percentage of .977 (30th in baseball). The Nationals have recorded 606 assists, 58 errors and have amassed 1,841 putouts this year.

Littell (40-33 career win-loss mark) has earned a 3.97 ERA while giving up 8.9 hits per 9 innings. He has a strikeout to walk ratio of 3.45 and he has faced 2,792 opposing batters in his career. He has conceded a total of 294 earned runs while holding a WHIP of 1.225 and being the owner of a FIP of 3.9. Thus far in his career, Littell has surrendered 661 hits while he has tallied 535 punch outs in 666 innings pitched.

Who will win tonight's MLB game against the spread or moneyline?

Guy Bruhn's Pick: Take Washington (+150)

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