Seattle Mariners vs Washington Nationals Prediction, 6/13/2026 MLB Picks, Best Bets & Odds

Game: Seattle Mariners vs Washington Nationals

Date: Saturday, June 13, 2026

Location: Nationals Park in Washington, D.C.

TV: Nationals.TV

Odds/Point Spread: Seattle (-160) Washington (+132)

The Seattle Mariners (36-33) are en route to Nationals Park on Saturday where they will attempt to defeat the Washington Nationals (35-34). The odds on this game have the Mariners at -160 while the Nationals are priced at +132. The total has been set at 8. The expected starting pitchers will be Luis Castillo and Cade Cavalli.

Seattle is slugging .396 and have been called out on strikes 595 times, while drawing a walk on 236 occasions. They have 285 RBI's in addition to 545 hits so far this year, while their batting average is .237. The Mariners have hit 94 doubles as a squad and have hit 87 baseballs out of the park. They have notched a total of 292 runs while having a team OBP of .317. As a unit, the Seattle Mariners are notching 4.2 runs per game, which is 20th in baseball.

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The Mariners have an earned run average of 3.54 so far this year (5th in MLB), and the staff has struck out 595 hitters. Mariners pitchers have given up 65 home runs in addition to 264 total runs (6th in MLB). Their pitching staff has walked 182 players from the other team and their FIP sits at 3.61 as a team so far this year. Seattle has allowed 554 base knocks (8.1 per 9 innings) as well as 242 earned runs. Their strikeout to walk ratio sits at 3.27 and the pitching staff has a collective WHIP of 1.19.

The Mariners have sent 211 relievers to the hill this year. The bullpen pitchers have inherited 69 base runners for the year and 18.8% of those runners earned a run for their team. The relief pitchers have 40 holds so far this year (12th in baseball). Mariners pitchers have stepped onto the hill with runners on 53 times in addition to having 85 appearances in high leverage situations. They have earned 16 saves on the year and have blown 13 out of their 29 save opportunities. The Mariners relief pitchers have recorded a save percentage of 55.2% and have stepped onto the mound in 70 save situations.

The Mariners have converted 69.7% of baseballs in play into outs out of their 5,544 innings on the diamond, which has them ranked 17th in professional baseball. The Seattle Mariners have earned a total of 1,848 putouts at this point in the season, in addition to 565 assists and 30 errors. Their fielding percentage sits at .988 which puts them in 10th in professional baseball, and they have turned 63 double plays.

Castillo (86-89 win-loss record in his career) has a FIP of 3.57 while he has faced 6,095 hitters in the majors. He has given up 1,268 base knocks (7.8 hits per nine innings) and has had 476 free passes. His earned run average is 3.62 (592 earned runs allowed) and he has a WHIP of 1.185. Castillo has taken the mound for 1,471 innings and has accumulated 1,554 strikeouts in his career.

The Nationals hold a slugging % of .419 and they average 5.39 runs per game (1st in baseball). They have hit 120 doubles, while taking a walk 243 times and putting up 372 runs. Washington has a total of 89 home runs so far this season to go along with 352 RBIs. They have been called out on strikes on 571 occasions (14th in baseball) and have recorded 583 base hits. The Washington Nationals have accumulated an OBP of .323 and a team batting average of .246 on the season.

The Nationals hold a team WHIP of 1.392 and are the owners of a FIP of 4.85 as a unit for the season. They are currently ranked 28th in baseball as a staff in total hits relinquished with 612. The Washington pitching staff have yielded 365 runs on the season and come in with a team ERA of 4.67 (322 earned runs allowed). Their K/BB ratio is 7.80 (537 strikeouts against 253 walks). They have allowed 98 dingers and they surrender 5.29 runs per 9 innings (29th in the league).

They are currently ranked 24th in baseball with a save percentage of 53.8%, and they have sent 223 relievers to the hill this year. Their bullpen pitchers have stepped onto the mound 78 times in high leverage situations in addition to 69 occasions with runners on. Sitting with 77 save situations, the Nationals have recorded 34 holds in addition to 18 blown saves. Washington has called on relievers to step onto the mound in 39 save chances and they have converted 21 saves. Washington relief pitchers have an inherited score percentage of 45.1% out of their 102 inherited runners.

The Washington Nationals have turned 51 double plays and have accounted for a fielding rate of .977 (30th in baseball). The Nationals have racked up 615 assists, 58 errors and have 1,865 putouts so far this year. In 5,595 innings played, the Nationals have a defensive efficiency of 69.5% (20th in the majors).

During his career, Cavalli has allowed 138 base hits while totaling 122 K's in 122 frames. He has given up a total of 60 ER's while earning a WHIP of 1.473 and a FIP of 4.4. His K/BB ratio is 2.90 and he has faced 555 opposing hitters so far in his MLB career. Cavalli (6-6 career win-loss mark) has a 4.42 earned run average and has conceded 10.2 hits per 9 innings.

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

Parlay's Pundit's Pick: Take Washington (+132) and under 8 runs

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