Washington Nationals vs Seattle Mariners Prediction, 5/28/2025 MLB Picks, Best Bets & Odds

Game: Washington Nationals vs Seattle Mariners

Date: Wednesday, May 28, 2025

Location: T-Mobile Park in Seattle, WA

TV: Root Sports Northwest

Odds/Point Spread: Washington (+102) Seattle (-122)

T-Mobile Park is where the Seattle Mariners (29-23) will attempt to defeat the Washington Nationals (24-29) on Wednesday. The moneyline on this matchup has the Nationals at +102 and the Mariners are priced at -122. The over/under has been set at 8.5. The pitchers taking the mound will be Trevor Williams and George Kirby.

As a team, the Washington Nationals are notching 4.3 runs per outing, which is 15th in MLB. They have racked up 225 runs scored while having a team on-base percentage of .309. The Nationals have accrued 84 two-baggers as a squad and have knocked 52 balls out of the park. They have recorded 212 RBI's in addition to 422 base knocks over the course of the season, while their average at the plate sits at .241. Washington has a slugging percentage of .387 and have been rung up 418 times, while taking a walk on 153 occasions.

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The Nationals hold a team ERA of 5.07 on the season (26th in MLB), and the staff has struck out 429 hitters. Nationals pitchers have surrendered 52 home runs and also 273 runs (25th in the league). They have walked 186 opposing players and their FIP comes in at 4.10 as a unit on the season. Washington has given up 469 base hits (9.1 per 9 innings) and 262 earned runs. Their strikeout to walk ratio is 2.31 and their pitching staff has a collective WHIP of 1.41.

The Nationals have dispatched 181 relievers to the mound on the year. The bullpen pitchers have inherited 111 base runners for the year and 41.4% of them earned a run for their team. They have tallied 16 saves for the year and have blown 7 of their 23 chances to get a save. The Nationals relievers have accumulated a save rate of 69.6% and have come into the game in 47 save situations. The bullpen have earned 24 holds over the course of the season (28th in the league). Nationals relief pitchers have gone to the mound with players on base 61 times as well as having 42 appearances in high leverage situations.

The Nationals have transformed 67.7% of baseballs in play into outs in their 4,185 innings on the field, which ranks them 27th in the majors. The Washington Nationals have earned 1,395 putouts on the campaign, in addition to 452 assists and 27 errors. Their fielding percentage sits at .986 which is 18th in the majors, and they have turned 38 double plays.

Williams has thrown 975 frames and has tallied 801 strikeouts so far in his career. Williams (52-60 mark in his career) holds a FIP of 4.35 and he has faced 4,212 hitters in the majors. His earned run average is 4.41 (478 earned runs allowed) and he has a WHIP of 1.372. He has conceded 1,021 base knocks (9.4 hits per 9 innings) and has 317 free passes.

Seattle has compiled 70 home runs for the year and 230 RBIs. They have tallied 66 doubles, while walking 206 times and scoring 238 runs. The Seattle Mariners are sitting with an on-base percentage of .325 and a batting average of .237 this season. The Mariners have a team slugging percentage of .397 and they score 4.58 runs per outing (10th in the league). They have struck out on 469 occasions (8th in MLB) and have accounted for 418 hits.

The Mariners have a WHIP of 1.323 with a FIP of 3.83 as a squad this season. They have earned a K/BB ratio of 8.00 (420 strikeouts vs 160 walks). They rank 23rd in the league as a pitching staff in total hits surrendered with 462. They have given up 51 HR's and they allow 4.19 runs per 9 innings (15th in the league). The Seattle pitching staff have surrendered 219 runs for the year while having an ERA of 3.69 (193 earned runs relinquished).

Sitting with 55 save situations, the Mariners have recorded 29 holds and 8 blown saves. Seattle has had bullpen pitchers step onto the hill in 26 save opportunities and they have tallied 18 saves. Their relievers have stepped onto the mound 77 times in high leverage situations and on 41 occasions with runners on. Seattle relievers have an inherited score rate of 25.5% out of 47 inherited base runners. They are currently ranked 8th in MLB holding a save rate of 69.2%, and they have sent 181 relievers to the mound so far this year.

In their 4,236 innings played, the Mariners have accumulated a defensive efficiency of 68.8% (21st in the majors). The Seattle Mariners have gotten 41 double plays and have accounted for a fielding rate of .988 (8th in pro baseball). The Mariners have recorded 464 assists, 23 errors and have a total of 1,412 putouts this season.

Kirby (35-27 career mark) is the owner of a 3.50 ERA while surrendering 8.8 hits per 9 innings. His K/BB ratio is 7.51 and he has faced 2,096 batters during his pro baseball career. He has allowed 200 earned runs while earning a WHIP of 1.100 and a FIP of 3.4. Thus far in his career, Kirby has allowed 501 hits and he has 488 strikeouts in 514 innings pitched.

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

Tony Sink's Pick: Take Washington (+102)

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