Guardians vs Mariners Prediction, Odds, Moneyline, Spread & Over/Under for June 28

Odds updated as of 9:12 p.m.

The Sunday slate in MLB includes a matchup between the Cleveland Guardians and the Seattle Mariners.

Before checking out the MLB betting lines on FanDuel Sportsbook, we've got you covered, in terms of the vital info regarding this matchup.

Guardians vs Mariners Game Info

• Cleveland Guardians (42-40) vs. Seattle Mariners (42-41)
• Date: Sunday, June 28, 2026
• Time: 1:40 p.m. ET
• Venue: Progressive Field -- Cleveland, Ohio
• Coverage: CleGuardians.TV and Mariners.TV

Guardians vs Mariners Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: CLE: (-108) | SEA: (-108)
• Spread: CLE: +1.5 (-192) | SEA: -1.5 (+158)
• Total: 7.5 -- Over: (-106) | Under: (-114)

Guardians vs Mariners Probable Starting Pitchers

Probable Pitchers: Gavin Williams (Guardians) - 9-4, 3.82 ERA vs Emerson Hancock (Mariners) - 5-4, 3.60 ERA

The Guardians will give the nod to Gavin Williams (9-4, 3.82 ERA), who is eyeing win No. 10 on the season, and the Mariners will turn to Emerson Hancock (5-4, 3.60 ERA). Williams' team is 8-7-0 against the spread this season in his starts. Williams' team has a record of 6-4 this season when he starts and they are the favorite on the moneyline. The Mariners have a 5-10-0 ATS record in Hancock's 15 starts that had a set spread. The Mariners were the moneyline underdog for one Hancock start this season -- they won.

Guardians vs Mariners Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (55.4%)

Guardians vs Mariners Moneyline

• Cleveland is a -108 favorite on the moneyline, while Seattle is a -108 underdog on the road.

Guardians vs Mariners Spread

Guardians vs Mariners Over/Under

• Guardians versus Mariners, on June 28, has an over/under of 7.5, with the over being -106 and the under -114.

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Guardians vs Mariners Betting Trends

• The Guardians have come away with 21 wins in the 41 contests they have been listed as the favorites in this season.
• Cleveland has a record of 21-21 in contests when sportsbooks favor them by -108 or more on the moneyline.
• The Guardians and their opponents have hit the over in 38 of their 78 games with a total set by oddsmakers this season.
• In 78 games with a line this season, the Guardians have a mark of 39-39-0 against the spread.
• The Mariners have won 28.6% of the games this season they were the underdog on the moneyline (2-5).
• Seattle has a record of 2-5 when playing as a moneyline underdog with odds of -108 or longer (28.6%).
• The Mariners have played in 82 games with a set over/under, and have combined with their opponents to go over the total 38 times (38-41-3).
• The Mariners have a 30-52-0 record ATS this season.

Guardians Player Leaders

• Brayan Rocchio leads Cleveland with an OBP of .342, plus a team-best slugging percentage of .386. He's batting .269 on the season.
• Among all qualifying hitters in the majors, his batting average ranks 47th, his on-base percentage ranks 60th, and he is 110th in slugging.
• Rocchio hopes to build on a two-game hitting streak in this matchup. In his last five games he is batting .273 with a double.
• Travis Bazzana has 11 doubles, a triple, seven home runs and 26 walks. He's batting .255 and slugging .436 with an on-base percentage of .350.
• Steven Kwan has 54 hits this season and has a slash line of .213/.322/.260.
• Kwan heads into this game with three games in a row with at least one hit. In his last five games he is hitting .308 with a double and two walks.
• Kyle Manzardo has nine home runs, 27 RBI and a batting average of .233 this season.
• Manzardo enters this matchup on a two-game hitting streak. During his last five outings he is hitting .176 with four walks and an RBI.

Mariners Player Leaders

• Julio Rodriguez has a .421 slugging percentage, which paces the Mariners. He's batting .247 with an on-base percentage of .307.
• Including all qualified hitters in MLB, he ranks 90th in batting average, 123rd in on-base percentage and 83rd in slugging percentage.
• Rodriguez takes a three-game hitting streak into this matchup. In his last five games he is hitting .250 with a walk and two RBIs.
• Randy Arozarena has collected 78 hits with a .372 OBP to pace his team in both. He has a batting average of .285 while slugging .438.
• Including all qualifying hitters, his batting average places him 25th, his on-base percentage ranks 24th, and he is 69th in slugging.
• Josh Naylor is hitting .254 with 10 doubles, eight home runs and 25 walks.
• Cole Young is batting .251 with 12 doubles, a triple, seven home runs and 22 walks.

Guardians vs Mariners Head to Head

• 6/26/2026: 3-1 SEA (Favorite: Guardians, Spread: -1.5, Total: 7.5, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 3/29/2026: 8-0 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -144, Underdog Moneyline: +122)
• 3/28/2026: 6-5 CLE (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -178, Underdog Moneyline: +150)
• 3/27/2026: 5-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -178, Underdog Moneyline: +150)
• 3/26/2026: 6-4 CLE (Favorite: Mariners, Spread: -1.5, Total: 6.5, Favorite Moneyline: -188, Underdog Moneyline: +158)
• 8/31/2025: 4-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -116, Underdog Moneyline: -102)
• 8/30/2025: 4-3 CLE (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -154, Underdog Moneyline: +130)
• 8/29/2025: 5-4 CLE (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -162, Underdog Moneyline: +136)
• 6/15/2025: 6-0 SEA (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -124, Underdog Moneyline: +106)
• 6/14/2025: 4-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -136, Underdog Moneyline: +116)

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