Mariners vs Royals Prediction 6/30/25 MLB Picks Today

The Kansas City Royals and the Seattle Mariners meet Monday in MLB action from T-Mobile Park. We will look at this from a betting perspective and determine the best bets for this game. Here’s a Mariners vs Royals Prediction.

Starting Pitching Matchup

The Kansas City Royals will send out Michael Wacha for the start here and Wacha is 4-7 with a 3.33 ERA and 74 strikeouts this season. In his last five starts against the Mariners, Wacha is 2-1 with a 4.32 ERA and 23 strikeouts. George Kirby will get the start for the Mariners here and is 1-4 with a 5.40 ERA and 36 strikeouts this season. In his career, Kirby is 1-0 with a 2.25 ERA and 12 strikeouts against the Royals.

Kansas City Royals Recap

The Kansas City Royals come into this game looking to bounce back from a 5-1 loss at the hands of the Los Angeles Dodgers last time out to sit at 39-45 on the year. After this series, the Royals will head on the road for a series against the Arizona Diamondbacks.

Royals Drop 7 Of Their Last 8

Bobby Witt Jr. has 94 hits with 29 doubles and 21 stolen bases along with 3 triples, 11 home runs and 43 RBIs while Vinnie Pasquantino has 86 hits with 9 doubles, a triple, 12 home runs and 47 RBIs. Maikel Garcia’s added 95 hits with 22 doubles, 3 triples, 8 home runs and 38 RBIs and 18 stolen bases and Salvador Perez also has 9 home runs and 43 RBIs but also has 69 strikeouts so far this season.

Why the Kansas City Royals will win

• The Royals have won each of their last eight road games following a home loss.
• The Mariners have lost each of their last six home games against American League opponents that held a losing record.
• The Royals have covered the run line in each of their last 11 games as road underdogs following a loss.
• The Mariners have failed to cover the run line in each of their last seven night games against the Royals following a road win.

Kansas City Royals Player Prop Facts

• Michael Wacha has recorded five or more strikeouts in each of his last five appearances against AL opponents.
• Jonathan India has hit a home run in three of his last five road appearances against AL West opponents that held a winning record.
• Bobby Witt Jr. has recorded a Double in each of the Royals’ last three games as road underdogs against AL opponents.
• Bobby Witt Jr. has recorded at least one hit in each of the Royals’ last 23 road games against opponents that held a winning record.
• Michael Wacha has recorded a win in four of his last five road appearances against AL West opponents.

Seattle Mariners Recap

The Seattle Mariners come into this game looking to build on their 6-4 win over the Texas Rangers last time out to sit at 43-40 on the year. After this series, the Mariners will take on the Pittsburgh Pirates at home.

Mariners Finish Road Trip On High Note

Jorge Polanco has 56 hits including 11 home runs and 38 RBIs while Cal Raleigh has 84 hits with 16 doubles, a team-high 32 home runs and 69 RBIs. Randy Arozarena has 72 hits with 20 doubles, 8 home runs, 33 RBIs and 15 stolen bases. Julio Rodriguez also has 88 hits with 12 doubles, 3 triples, 11 home runs, 42 RBIs and 13 stolen bases. Dylan Moore has 8 homers and 9 stolen bases as well this season. Rowdy Tellez has also added 11 home runs and 27 RBIs while J.P Crawford has 81 hits with 10 doubles, 6 home runs and 30 RBIs.

Why the Seattle Mariners will win

• The Royals have lost each of their last eight night games against American League opponents that held a winning record.
• The Mariners have won nine of their last 10 home games against the Royals.
• The Royals have failed to cover the run line in six of their last seven games against American League opponents that held a winning record.
• The favorites have covered the run line in three of the Mariners’ last four games at T-Mobile Park.

Seattle Mariners Player Prop Facts

• George Kirby has recorded five or more strikeouts in each of his last four appearances with the Mariners as favorites against AL Central opponents.
• Julio Rodriguez has recorded at least one hit in each of his 16 previous appearances against the Royals.
• Luke Raley has hit a home run in three of his last four home appearances against AL Central opponents.
• Victor Robles has recorded a Double in three of his last four appearances against AL Central opponents.
• Cal Raleigh ranks 1st in the league in Home Runs (32) this season.

Total Runs Facts

• Seven of the Royals’ last eight games have gone UNDER the total runs line.
• Six of the Mariners’ last seven games as favorites have gone OVER the total runs line.

Mariners vs Royals Prediction

I’m on the Mariners here. I get the case to be made for the Royals, as Wacha hasn’t been terrible this season. However, the Royals’ offense continues to be inconsistent, and I don’t know if I can trust them here to match what the Mariners bring to the table. The Mariners have been the more trustworthy offense as of late, and I think that Seattle draws first blood here. Give me the Mariners here.