Kansas City Royals vs Seattle Mariners Prediction & Picks - MLB

USA - MLB

Kansas City Royals
9/16/25 19:40
Seattle Mariners

Prediction:

 

The Mariners -1.5 Runs

+118
$350 offered for betting!

New customers only | Commercial content | 21+ age limit | T&Cs apply

 by Lou Aguila | in MLB Picks

The Seattle Mariners will try to push their win streak to 10 games as they gear up for a rough opener against the Kansas City Royals on Tuesday at Kaufmann Stadium.

The Mariners, who have won by at least two runs in seven of their last nine victories, are booked at +118 to cover -1.5 runs in Game 1.

Current Form:

The Mariners (82-68) are on a roll, winning their last 9 games – including sweeps over the St. Louis Cardinals and the LA Angeles. Thanks to this hot run, Seattle has overtaken the Houston Astros (82-69) by 0.5 games for the No.1 spot in the AL West. Cal Raleigh continues to make a case for the AL MVP after raising his home run tally to 54 runs. Jorge Polanco has also delivered the goods in the last 10 games, going 15 for 38 at the plate with nine RBIs and one homer.

The Royals ended their three-game losing streak on Sunday with a 10-3 win over the Philadelphia Phillies. Kansas City returned to .500 with a 75-75 slate, though they are now 3.5 games off a wild-card spot in the American League. Vinnie Pasquantino has driven right runs on 14 for 39 batting over the last 10 games.

Kansas City Royals vs Seattle Mariners Form

Table

Teams Pts P W L
8 Seattle Mariners
0.556 162 90 72
15 Kansas City Royals
0.506 162 82 80

Kansas City Royals and Seattle Mariners Latest Matches

Kansas City Royals
Kansas City Royals Latest matches
L W L L L W
Victories

2/6 (33%)

Defeats

4/6 (67%)

Sep 14, 2025 - MLB

Philadelphia Phillies
3 :  10
Kansas City Royals

Sep 13, 2025 - MLB

Philadelphia Phillies
8 :  6
Kansas City Royals

Sep 12, 2025 - MLB

Philadelphia Phillies
8 :  2
Kansas City Royals

Sep 11, 2025 - MLB

Cleveland Guardians
3 :  2
Kansas City Royals

Sep 10, 2025 - MLB

Cleveland Guardians
3 :  4
Kansas City Royals

Sep 9, 2025 - MLB

Cleveland Guardians
2 :  0
Kansas City Royals
L L W W W L
Victories

3/6 (50%)

Defeats

3/6 (50%)

Sep 7, 2025 - MLB

Kansas City Royals
1 :  5
Minnesota Twins

Sep 6, 2025 - MLB

Kansas City Royals
11 :  2
Minnesota Twins

Sep 5, 2025 - MLB

Kansas City Royals
2 :  1
Minnesota Twins

Sep 4, 2025 - MLB

Kansas City Royals
4 :  3
Los Angeles Angels

Sep 3, 2025 - MLB

Kansas City Royals
3 :  4
Los Angeles Angels

Sep 2, 2025 - MLB

Kansas City Royals
1 :  5
Los Angeles Angels
L W L L L W
Victories

2/6 (33%)

Defeats

4/6 (67%)

Sep 14, 2025 - MLB

Philadelphia Phillies
3 :  10
Kansas City Royals

Sep 13, 2025 - MLB

Philadelphia Phillies
8 :  6
Kansas City Royals

Sep 12, 2025 - MLB

Philadelphia Phillies
8 :  2
Kansas City Royals

Sep 11, 2025 - MLB

Cleveland Guardians
3 :  2
Kansas City Royals

Sep 10, 2025 - MLB

Cleveland Guardians
3 :  4
Kansas City Royals

Sep 9, 2025 - MLB

Cleveland Guardians
2 :  0
Kansas City Royals
Seattle Mariners
Seattle Mariners Latest matches
W W W W W W
Victories

6/6 (100%)

Defeats

0/6 (0%)

Sep 14, 2025 - MLB

Seattle Mariners
11 :  2
Los Angeles Angels

Sep 13, 2025 - MLB

Seattle Mariners
5 :  3
Los Angeles Angels

Sep 12, 2025 - MLB

Seattle Mariners
2 :  1
Los Angeles Angels

Sep 11, 2025 - MLB

Seattle Mariners
7 :  6
Los Angeles Angels

Sep 10, 2025 - MLB

Seattle Mariners
4 :  2
St. Louis Cardinals

Sep 9, 2025 - MLB

Seattle Mariners
5 :  3
St. Louis Cardinals
W W W W W W
Victories

6/6 (100%)

Defeats

0/6 (0%)

Sep 14, 2025 - MLB

Seattle Mariners
11 :  2
Los Angeles Angels

Sep 13, 2025 - MLB

Seattle Mariners
5 :  3
Los Angeles Angels

Sep 12, 2025 - MLB

Seattle Mariners
2 :  1
Los Angeles Angels

Sep 11, 2025 - MLB

Seattle Mariners
7 :  6
Los Angeles Angels

Sep 10, 2025 - MLB

Seattle Mariners
4 :  2
St. Louis Cardinals

Sep 9, 2025 - MLB

Seattle Mariners
5 :  3
St. Louis Cardinals
L L L L W W
Victories

2/6 (33%)

Defeats

4/6 (67%)

Sep 7, 2025 - MLB

Atlanta Braves
2 :  18
Seattle Mariners

Sep 6, 2025 - MLB

Atlanta Braves
2 :  10
Seattle Mariners

Sep 5, 2025 - MLB

Atlanta Braves
4 :  1
Seattle Mariners

Sep 3, 2025 - MLB

Tampa Bay Rays
9 :  4
Seattle Mariners

Sep 2, 2025 - MLB

Tampa Bay Rays
6 :  5
Seattle Mariners

Sep 1, 2025 - MLB

Tampa Bay Rays
10 :  2
Seattle Mariners

Kansas City Royals against Seattle Mariners : Head to Head (H2H)

Kansas City Royals

50 %

Seattle Mariners

50 %

Jul 3, 2025 - MLB

Seattle Mariners
2 :  3
Kansas City Royals

Jul 2, 2025 - MLB

Seattle Mariners
3 :  2
Kansas City Royals

Jul 1, 2025 - MLB

Seattle Mariners
3 :  6
Kansas City Royals

Jun 30, 2025 - MLB

Seattle Mariners
6 :  2
Kansas City Royals

Jun 9, 2024 - MLB

Kansas City Royals
5 :  6
Seattle Mariners

Jun 8, 2024 - MLB

Kansas City Royals
8 :  4
Seattle Mariners

Kansas City Royals - Seattle Mariners Key Points

  1. Kansas City is 2-6 SU in its last 8 games.
  2. Kansas City is 1-4 SU in its last 5 games against an opponent in the American League.
  3. Seattle is 9-0 SU in its last 9 games.
  4. Seattle is 11-5 SU in its last 16 games against Kansas City.

Our Kansas City Royals vs Seattle Mariners Prediction

Expect the Mariners to sustain their red-hot form by routing the Royals for their 10th straight win. Seattle is 11-5 in its last 16 games against Kansas City. The Mariners have sported an impeccable 2.16 ERA over their last 10 games, while averaging 6.7 runs per game on a .273 BA in the stretch. Logan Gilbert hasn’t allowed more than one run in his last two starts. Gilbert surrendered one earned run and struck out seven over 4.2 innings in his last start versus the Royals on July 2.

Meanwhile, the Royals are 2-6 in their last eight games, though seven of these games were against wild card contenders Cleveland Guardians, and NL East leaders, the Philadelphia Phillies. Projected starter Michael Wacha is coming off a solid mound appearance against Minnesota on September 5, allowing one earned run and four hits over 5.2 innings. The problem for Kansas City lies in its bullpen, which has surrendered a 5.12 ERA in the last five games. The Royals have also averaged 3.6 runs per game in their last three meetings with the Mariners.

Our betting prediction for the Kansas City Royals vs. the Seattle Mariners: the Mariners -1.5 Runs

Prediction:

 

The Mariners -1.5 Runs

+118
$350 offered for betting!

All tips are fully researched and given in good faith, but profits cannot be guaranteed.

Kansas City Royals vs Seattle Mariners Picks