Kansas City Royals (39-44) vs. Seattle Mariners (42-40)  The MLB betting action goes on Monday, June 30, 2025, with the Kansas City Royals taking on the Seattle Mariners in the American League showdown at T-Mobile Park in Seattle, Washington, and we’ve got the Royals vs. Mariners prediction along with the latest odds update.   The Royals meet the Mariners for the first time this season, as they start a four-game series at T-Mobile Park. Last year, they split a six-game set, with each team winnin... Read more

It’s the start of a four-game series in the Northwest and we have you covered with team breakdowns and our Royals vs. Mariners predictions for the series opener on Monday night. Kansas City (39-44, 4th in A.L. Central) has lined up RHP Michael Wacha (4-7, 3.33 ERA) as their starting pitcher for this matchup. Seattle (42-40, 2nd in A.L. West) will go with RHP George Kirby (1-4, 5.40 ERA). The first pitch from T-Mobile Park is set for 9:40 EST and to jump on more Monday action, check out our MLB P... Read more

Get our free Baseball betting pick for the Seattle Mariners vs Kansas City Royals matchup and gain an edge as a Baseball bettor. Read more