Cleveland Guardians vs Seattle Mariners Prediction 6/15/25 MLB Picks

In this article, we will formulate a Guardians vs Mariners prediction for this MLB game on Sunday, June 15, at T-Mobile Park in Seattle, Washington. Let’s take a look at the prediction for this MLB matchup.

Cleveland Guardians Betting Preview

The Cleveland Guardians (35-34, 16-19 Away) lost three straight series as they fell to the Yankees, Astros, and Reds. They will add another loss following a pair of defeats to the Mariners in the current series. After a 7-2 loss in Game 1, the Guardians fell short 4-3 in Game 2. Tanner Bibee pitched for 5.0 innings in a no-decision, allowing two runs on four hits with three strikeouts and three walks. Emmanuel Clase took the loss. 

This season, the Guardians average 3.91 runs per game (24th in the MLB) on a .233/.306/.377 triple-slash. When it comes to pitching, the Guardians’ staff has a 3.95 ERA (17th) and 1.38 WHIP (23rd). Jose Ramirez leads the Guardians with a .329 batting average, 13 home runs, and 34 RBI this season.

Luis Ortiz will take the mound for the Guardians on Sunday. The 26-year-old right-hander has a 3-7 record in 13 starts this year with a 4.26 ERA and 1.45 WHIP in 69.2 innings.

Seattle Mariners Betting Preview

The Seattle Mariners (35-34, 18-17 Home) also lost three consecutive series to the Orioles, Angels, and Diamondbacks. After losing eight of ten games, the Mariners defeated the Guardians in the opening two games of the current series. In Saturday’s 4-3 victory, Jorge Polanco led the offense with two RBI, while George Kirby pitched for 5.0 innings in a no-decision, allowing two runs on five hits with five strikeouts and three walks. Jackson Kowar was credited with the win. 

This year, the Mariners average 4.38 runs per game (12th in the MLB) on a .244/.323/.399 triple-slash. When it comes to pitching, the Mariners’ staff has a 4.02 ERA (20th) and 1.32 WHIP (19th). Cal Raleigh leads the Mariners with a .263 batting average, 26 home runs, and 54 RBI this season.

The projected starting pitcher for the Mariners is Emerson Hancock, who is 2-2 in 11 starts this season, with a 5.04 ERA and 1.50 WHIP in 55.1 innings.

Total Runs Facts

• Eight of the last nine games between the Guardians and Mariners have gone OVER the total runs line.
• Five of the Guardians’ last six games as underdogs against the Mariners have gone OVER the total runs line.
• The ‘Inning 1 UNDER 0.5 runs’ market has hit in each of the Guardians’ last six day games against American League opponents.
• The ‘Inning 1 OVER 0.5 runs’ market has hit in seven of the last eight day games between the Guardians and Mariners.

Matchup/League Facts

• The Mariners are one of only four teams in the league to rank top 10 in both steals and home runs this season.
• The Mariners rank T26th in the league for triples this season (4).
• The Guardians rank 25th in the league for walks allowed this season (252).
• The Guardians rank 24th in the league for runs scored this season (270).

Guardians vs Mariners Prediction

The teams have traded wins in the last couple of seasons, each recording five in the previous ten H2H duels. Even though eight of the last ten H2Hs went Over, I am going with Under in this one. The reason for this is a fine form of both starters, Luis Ortiz and Emerson Hancock. Ortiz allowed more than three runs in just one of his last six starts, while Hancock kept the opponents to three or fewer runs in each of his previous five starts. I have faith in bullpens late in the game, so I am going with Under. 

Oliver Zivic's Pick: Under 8.5