Miami Marlins vs Seattle Mariners Prediction, 4/26/2025 MLB Picks, Best Bets & Odds
Game: Miami Marlins vs Seattle Mariners
Date: Saturday, April 26, 2025
Location: T-Mobile Park in Seattle, WA
TV: Root Sports Northwest
Odds/Point Spread: Miami (+125) Seattle (-145)
The Miami Marlins (11-13) are on their way to T-Mobile Park on Saturday where they will take on the Seattle Mariners (13-11). The line on this contest has the Marlins at +125 while the Mariners open at -145. The betting total is set at 8.5. The pitchers expected to start will be Connor Gillispie and Luis Castillo.


As a team, the Miami Marlins are notching 4.4 runs per game, which has them sitting at 13th in baseball. They are sitting with 106 runs while holding a team OBP of .326. The Marlins have compiled 46 two-baggers as a unit and have smacked 19 balls out of the stadium. They have 99 RBI's in addition to 216 base knocks on the campaign, while their team batting average is .260. Miami has a slugging % of .388 and have struck out 221 times, while being walked on 77 occasions.
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The Marlins have an ERA of 4.89 for the year (28th in baseball), and the staff has rung up 193 hitters. Marlins pitchers have relinquished 28 long balls and 127 total runs (29th in the league). They have walked 103 hitters and their FIP comes in at 4.49 as a squad on the campaign. Miami has conceded 209 base hits (8.7 per 9 innings) and 118 earned runs. They have earned a strikeout to walk ratio of 1.87 and the pitching staff holds a collective WHIP of 1.44.
The Marlins relief pitchers have accumulated a save percentage of 62.5% and have entered the game in 23 save situations. The relief pitchers have inherited 38 base runners this year with 34.2% of those runners crossed the plate. Marlins pitchers have entered the game with runners on 28 times as well as having 29 appearances in high leverage situations. The Marlins have dispatched 81 relievers to the hill for the season. The relief pitchers have recorded 15 holds for the year (15th in MLB). They have accumulated 5 saves over the course of the season and have blown 3 of 8 save chances.
The Marlins have converted 69.8% of balls hit into play into outs out of their 1,953 innings, ranking them 18th in professional baseball. The Los Angeles Dodgers have 651 putouts so far this season, as well as 227 assists and 11 errors. Their fielding percentage is holding steady at .988 which has them ranked 11th in professional baseball, and they have turned 15 double plays.
Gillispie has taken the hill for 32 frames and has 29 strikeouts in his career. His ERA is 5.63 (20 earned runs allowed) and he has a WHIP of 1.344. He has surrendered 30 base hits (8.4 hits per nine innings) and has 13 walks. Gillispie (0-2 mark in his career) is the owner of a FIP of 5.54 while he has gone up against 140 batters during his time in the major leagues.
Seattle has recorded 34 long balls on the campaign to go along with 102 runs batted in. They have recorded 27 doubles, while taking a walk 103 times and scoring 109 runs. The Seattle Mariners hold a team OBP of .326 and a batting average of .228 on the season. The Mariners hold a team SLG% of .393 and they are earning 4.54 runs per contest (10th in the league). They have been called out on strikes on 220 occasions (10th in MLB) and are sitting with 183 base hits.
The Mariners hold a team WHIP of 1.368 with a FIP of 3.63 as a team this season. They currently have a K/BB ratio of 8.30 (203 strikeouts vs 89 walks). They sit at 25th in baseball as a staff in total hits relinquished with 212. They have conceded 20 homers and they concede 4.33 runs per 9 innings (14th in the league). The Seattle pitching staff have relinquished 106 runs this year while holding an ERA of 3.97 (97 earned runs conceded).
Sitting with 26 save situations, the Mariners have accrued 14 holds and also 4 blown saves. Seattle has had bullpen pitchers step onto the hill in 12 save chances and they have walked away with 8 saves. Their relief pitchers have taken the field 34 times in high leverage situations in addition to 25 occasions with runners on. Seattle bullpen pitchers have an inherited score percentage of 28.0% out of their 25 inherited base runners. They rank 14th in baseball holding a save rate of 66.7%, and they have sent 90 bullpen pitchers to the hill for the year.
In their 1,983 innings on the diamond, the Mariners have a defensive efficiency of 68.6% (23rd in baseball). The Seattle Mariners have turned 18 double plays and have notched a fielding percentage of .989 (4th in pro baseball). The Mariners have 232 assists, 10 errors and have earned 661 putouts during this campaign.
Castillo (75-78 win-loss mark in his career) has a 3.58 earned run average while giving up 7.7 hits per 9 innings. His strikeout to walk ratio is 3.23 and he has faced 5,200 batters so far in his pro baseball career. He has surrendered 499 ER's while holding a WHIP of 1.185 and having a FIP of 3.5. So far in his MLB career, Castillo has conceded 1,070 base hits while he has tallied 1,354 K's in 1,256 innings pitched.
Who will win tonight's MLB game against the spread or moneyline?
Guy Bruhn's Pick: Take Seattle (-145)
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Additional Resources:
Seattle Mariners - Twitter
Miami Marlins - Twitter