Guardians vs Mariners Prediction 6/13/25 MLB Picks Today

The Cleveland Guardians are visiting the Seattle Mariners on Friday, June 13^th at the T-Mobile Park in the opening game of this series. We will look at this from a betting perspective and determine the best bets for this game. Here’s a Guardians vs Mariners Prediction. We will examine:

The Seattle Mariners’ recent form and player performance

The Cleveland Guardians’ recent form and player performance

Recent betting trends and streaks involving the Seattle Mariners

Recent betting trends and streaks involving the Cleveland Guardians

Recent betting trends in games played between the Cleveland Guardians vs Seattle Mariners

A summary that ties it all together and produces a favorable betting outcome for the Cleveland Guardians vs Seattle Mariners game

Seattle Mariners Preview

The Seattle Mariners have a 33-34 record this season and are sitting in second place in the AL West. The Mariners have a 17-16 road record and 35-28 in over/under. They are coming off a 2-5 road defeat by the Dbacks, and are 1-8 in their last 9 games. Under is 5-3-2 in their last 10 games, and they are playing the Red Sox and the Cubs next.

The Mariners have a .241 batting average this season, a .320 OBP, and a .396 Slugging percentage. Seattle’s pitching staff has a 4.06 ERA and 1.33 WHIP. Julio Rodriguez leads the Mariners in hits with 71, while Cal Raleigh leads the team both in RBI with 53 and in home runs with 26. J.P. Crawford is the team’s best hitter with a .279 batting average.

Luis Castillo (R) is the projected starting pitcher for the Mariners, and he has a 4-4 record, 3.31 ERA, and 1.30 WHIP. He has been better at home with a 2.25 ERA across seven home starts, but he struggled in his last start, having given up 4 runs in 5 innings of work against the Angels. Luis Castillo is 1-5 with an ERA of 4.98 and 50 strikeouts in 9 appearances against the Guardians in his career.

Cleveland Guardians Preview

The Cleveland Guardians have a 35-32 record this season and are sitting in third place in the AL Central. The Guardians have a 16-17 road record and are 31-33 in over/under. They are coming off an 11-2 home victory over the Reds, but are just 2-5 in their last 7 games. Under is 7-3 in their last 10 games, and are playing the Giants and the Athletics next.

The Guardians have a .234 batting average this season, a .307 OBP, and a .377 Slugging percentage. Cleveland’s pitching staff has a 3.89 ERA and 1.36 WHIP. Jose Ramirez leads the Guardians with 81 hits and a team-high .331 batting average, while leading the team in home runs, with 12. Carlos Santana leads the team in RBI, with 34.

Gavin Williams (R) will take the mound for the Guardians, and he has a 5-3 record, 3.86 ERA, and 1.42 WHIP. He has been weaker on the road with a 4.38 ERA across five road starts, but he has given up 3+ runs in two of his last three starts. This will be his first career start against the Mariners.

Why the Seattle Mariners will win

• The Guardians have lost each of their last four night games following a win.
• The Mariners have won each of their last four home games following a road loss.
• The home team has covered the run line in each of the Mariners’ last six games.
• The Guardians have failed to cover the run line in each of their last four night games against AL West opponents following a win.
• The Guardians have trailed after 3 innings in each of their last three games at T-Mobile Park against AL West opponents that held a losing record.
• The Guardians have trailed after 5 innings in nine of their last 10 night games.
• The Guardians have lost the first inning in each of their last three games at T-Mobile Park against American League opponents that held a losing record.

Why the Cleveland Guardians will win

• The Guardians have won each of their last six games as underdogs against the Mariners.
• The Mariners have lost six of their last seven games as home favorites against American League opponents.
• The Mariners have failed to cover the run line in each of their last 12 games as favorites against American League opponents.
• The underdogs have covered the run line in each of the Mariners’ last eight games at T-Mobile Park.
• The Guardians have led after 3 innings in each of their last four road games against AL West opponents that held a losing record.
• The Mariners have trailed after 5 innings in each of their last four night games.

Total Runs Facts

• Ten of the Guardians’ last 11 night games against American League opponents have gone UNDER the total runs line.
• Each of the last four games between the Guardians and 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 games as underdogs against AL West opponents.
• The ‘Inning 1 UNDER 0.5 runs’ market has hit in six of the last seven night games between the Guardians and Mariners at T-Mobile Park.

Matchup/League Facts

• The Mariners rank T29th in the league for doubles this season (85).
• The Mariners rank T4th in the league for steals this season (65).
• The Guardians rank T26th in the league for hits this season (512).
• The Guardians rank T25th in the league for doubles this season (93).

Guardians vs Mariners Prediction

The Guardians are 4-1 in their last 5 meetings against the Mariners, and are 3-1 in their last 4 visits in Seattle. Over is 8-1-1 in their last 10 meetings.

In this Guardians vs Mariners Prediction, the Mariners are coming as -130 home favorites. The Guardians have a better overall record, and both teams have exactly 16 wins at home and away. I don’t trust any of those pitchers, as their advanced stats indicate that they are due for some negative regression, having a combined 9.07 expected ERA. Both teams are better against righties and average 8.8 runs per game against right-handed pitching. The total is set at a low 7, and with both pitchers also being shaky lately, I don’t expect just 6 runs in this game. Take the over 7.