Phillies vs Mariners Prediction 8/18/25 MLB Picks Today

In this article we will formulate a Phillies vs Mariners prediction for this MLB game on Monday, August 18th at Citizens Bank Park in Philadelphia, Pennsylvania. Let’s take a look at the prediction for this MLB matchup. 

Philadelphia Phillies Betting Preview

The Philadelphia Phillies are 71-53 this year after they split four games with Washington by scores of 2-3, 6-2, 0-2, and 11-9. In their game four win, Philadelphia blew a 6-0 lead in the early innings, but scored the next five runs and hung on for the win. The Phillies recorded 12 hits in the game and they were led by Bohm, who went 2-4 with one home run and three RBIs in the win. Philadelphia started Nola, who allowed seven hits and six earned runs over 2.1 innings, while Banks picked up the win in relief.

Prior to that series, the Phillies lost two out of three against the Reds, but did win all three against the Rangers before that. Philadelphia has lost four of their last six games and they are currently first in the NL East standings. The Philadelphia pitching staff has a 3.75 ERA with a 1.23 WHIP and a .244 opponent batting average, while the offense has scored 575 runs with a .253 batting average and a .324 on base percentage this season. Kyle Schwarber has led Philadelphia with 43 home runs and 102 RBIs, while Nick Castellanos has added 16 home runs and 61 RBIs this year. The projected starting pitcher for Philadelphia is Ranger Suarez, who is 8-6 with a 3.28 ERA and a 1.20 WHIP over 112.1 innings pitched this year. 

Seattle Mariners Betting Preview

The Seattle Mariners are 68-57 this season after they lost two out of three against the Mets by scores of 11-9, 1-3, and 3-7. In their game three loss, Seattle cut the deficit to 3-1 in the fourth inning, but left the bases loaded and never recovered. The Mariners recorded 10 hits in the game and they were led by Raleigh, who went 2-5 with one home run and two RBIs in the loss. Seattle started Kirby, who allowed 12 hits and seven earned runs over 4.2 innings for the loss, while Saucedo and Kowar pitched well in relief. 

Prior to that series, the Mariners lost two out of three against the Orioles, but did sweep the Rays in three games before that. Seattle has lost four of their last five games and they are currently second in the AL West standings. The Seattle pitching staff has a 3.85 ERA with a 1.24 WHIP and a .240 opponent batting average, while the offense has scored 569 runs with a .243 batting average and a .320 on base percentage this season. Cal Raleigh has led Seattle with 47 home runs and 102 RBIs, while Julio Rodriguez has added 24 home runs and 69 RBIs this year. The projected starting pitcher for Seattle is Logan Gilbert, who is 3-4 with a 3.31 ERA and a 0.98 WHIP over 89.2 innings pitched this season. 

Why the Mariners will beat the Phillies

• The Mariners have won each of their last five games as underdogs.
• The Phillies have lost four of their last five games as favorites following a road win.
• The underdogs have covered the run line in each of the Mariners’ last six games.
• The Phillies have failed to cover the run line in each of their last four home games against American League opponents following a road win.
• The Phillies have trailed after 3 innings in four of their last five games against AL West opponents that held a winning record.
• The Phillies have trailed after 5 innings in each of their last four night games against opponents that held a winning record.

Total Runs Facts

• Each of the Mariners’ last seven night games against NL East opponents have gone OVER the total runs line.
• Four of the Phillies’ last five games as favorites against AL West opponents have gone OVER the total runs line.
• The ‘Inning 1 OVER 0.5 runs’ market has hit in eight of the Phillies’ last nine games as favorites against AL West opponents.
• The ‘Inning 1 OVER 0.5 runs’ market has hit in eight of the Mariners’ last nine games as road underdogs against NL East opponents.

Matchup/League Facts

• The Phillies rank 2nd in the league for strikeouts this season (1120).
• The Phillies rank 2nd in the league for walks allowed this season (334).
• The Mariners rank 30th in the league for doubles this season (166).
• The Mariners rank 29th in the league for triples this season (7).

David Racey is 25-16 (61%) in the MLB over the last seven days. Click here for his premium plays for today!

Phillies vs Mariners Prediction 

Both of these teams come into this matchup with very good records on the season, but both have also had some issues recently. The Phillies are 37-21 at home this year, while the Mariners are 31-32 on the road. Seattle has not played well in their last six games and they are starting Gilbert, who has allowed two earned runs or fewer in three of his last five starts. Philadelphia is going with Suarez, who has allowed 6, 5, and 3 earned runs in his last three outings. We are seeing some major regression with Suarez on the mound, so give me the Mariners here.