Seattle Mariners vs Cleveland Guardians Forecast, 8/31/2025 MLB Selections, Top Bets & Odds

Game: Seattle Mariners vs Cleveland Guardians

Date: Sunday, August 31, 2025

Venue: Progressive Field, Cleveland, OH

Broadcast: CLEGuardians.TV

Betting Odds: Seattle (-144) Cleveland (+120)

This Sunday, the Seattle Mariners (72-62) will clash with the Cleveland Guardians (66-66) at Progressive Field. The betting lines favor Seattle at -144, while Cleveland comes in at +120. The game has an over/under of 9 runs, with Bryce Miller and Tanner Bibee slated as the starting pitchers.

The Mariners have a slugging percentage of .410, with a total of 1,198 strikeouts and 450 walks this season. They’ve recorded 591 RBIs and have racked up 1,100 hits, with a season batting average of .241. The team has produced 183 doubles and hit 191 home runs, scoring a total of 616 runs and achieving a .317 on-base percentage. On average, Seattle generates 4.6 runs per game, ranking them 11th in Major League Baseball.

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This season, Seattle boasts a team ERA of 3.97 (ranked 17th in MLB) and has logged 1,146 strikeouts. Their pitchers have surrendered 162 home runs and 591 runs (18th in baseball), while issuing 403 walks. The Mariners’ FIP stands at 4.12. To date, they have allowed 1,121 hits (8.3 hits per 9 innings) and have given up 534 earned runs. Their K/BB ratio is 2.84, with a WHIP of 1.26.

Seattle’s bullpen has a save percentage of 62.5%, having faced 130 save opportunities. The relievers have inherited 123 base runners this season, with 25.2% scoring. Mariners relievers entered with runners on base 112 times and have made 181 high-leverage appearances. This season, 452 relief pitchers have taken the mound, with the bullpen achieving 74 holds (14th in the league) and securing 35 saves out of 56 opportunities.

The Mariners have recorded 3,631 putouts, 1,131 assists, and 55 errors this season. Their fielding percentage of .989 ranks 4th in MLB, with a total of 99 double plays. Seattle has converted 70.3% of batted balls into outs over their 10,893 innings, placing them 12th in professional baseball.

Miller has pitched 369 innings during his career, accumulating 337 strikeouts with an earned run average of 3.92 (161 ER). His WHIP stands at 1.121, with 317 hits allowed (7.7 hits per nine innings) and 97 walks. With a career record of 23-20, he holds a FIP of 3.86, having faced 1,500 hitters in Major League Baseball.

The Guardians have a collective slugging percentage of .366 and average 3.85 runs per game (28th in MLB). Their lineup includes 189 doubles, 407 walks, and 508 runs batted in. Cleveland has hit 133 home runs this season and struck out 1,093 times (18th in MLB), accumulating a total of 966 hits. Their on-base percentage is .295, paired with a batting average of .224.

The Guardians pitch with a team WHIP of 1.310 and a FIP of 4.14 for the season. They rank 10th in total hits allowed with 1,077. Cleveland’s pitchers have given up 563 runs this season, with an ERA of 3.93 (512 earned runs). Their K/BB ratio is 8.40 (1,099 strikeouts versus 461 walks), and they’ve allowed 145 home runs, yielding 4.32 runs per nine innings (15th in MLB).

Cleveland has encountered 150 save situations, recording 91 holds and 18 blown saves. The Guardians’ bullpen has faced 56 save opportunities, successfully converting 38 saves. Relief pitchers have appeared in high-leverage situations 153 times and with runners on base 122 occasions. Their inherited score percentage is 33.5% out of 170 inherited base runners, resulting in a save percentage of 67.9%, ranking 5th in the league with 441 unique bullpen pitchers taking the field this year.

With 10,566 innings logged, Cleveland’s defensive efficiency stands at 69.6% (19th in professional baseball). They’ve turned 95 double plays and have a .982 fielding percentage (28th in professional baseball). This season, the Guardians recorded 1,076 assists, 86 errors, and had 3,522 putouts.

In his career, Bibee has allowed 420 hits and achieved 460 strikeouts across 463 innings. With a career record of 31-22, he sports a 3.73 ERA and relinquishes 8.2 hits per nine innings. Bibee has allowed 192 earned runs and has a WHIP of 1.200 along with a FIP of 3.7. His K/BB ratio is 3.38, having faced 1,928 opposing batters throughout his MLB career.

Which team will prevail in tonight’s MLB showdown, whether against the spread or on the moneyline?

Josh Schonwald’s Prediction: Bet on Cleveland (+120)

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