The Cleveland Guardians visit T-Mobile Park to take on the Seattle Mariners on June 15th, 2025, at 4:10 pm. The moneyline odds show the Guardians at +118 and the Mariners at -139, with a spread of +1.5 for Cleveland at +155 and -1.5 for Seattle at +165. Check out The Edge AI sports betting tool for the best bets on this matchup. The Guardians have a record of 35-33, while the Mariners sit at 34-34, making this a close contest with both teams looking to gain momentum. Key players for the Guardians include José Ramírez, who boasts a .327 batting average with 12 home runs and 33 RBIs, and Steven Kwan, hitting .308 with 6 home runs. For the Mariners, J.P. Crawford leads with a .286 average and a .396 on-base percentage, while Julio Rodríguez adds depth with 10 home runs and 34 RBIs. No significant injuries are reported for either team, which should keep both lineups intact. In their recent history, the Mariners have won two of the last three matchups against the Guardians, adding an intriguing layer to this matchup.