Kansas City Royals vs Seattle Mariners Prediction & Picks - MLB

USA - MLB

Kansas City Royals
5/23/26 16:10
Seattle Mariners

Prediction:

 

UNDER 8.5

-105
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 by Travis Pulver | in MLB Picks

The Kansas City Royals (20-31, 13-14 Home) will try to end their home losing streak today when they host the Seattle Mariners (25-27, 11-12 AWAY) at Kaufman Stadium in Kansas City, MO. Fans can follow the action on MLB.TV once the game gets underway at 4:10 pm EST.

They had a shot at ending the game on the right side of the scoreboard yesterday in Game One of their weekend series with the Mariners. But they couldn't generate any offense, so Mitch Garver's two-run shot in the seventh inning was all they needed for the win.

Stephen Kolek is scheduled to make the start for the Royals. Kolek is 2-09 in three starts with a 4.24 ERA and a 1.0 WHIP. Kolek pitched well in his last outing (May 17 vs. the Cardinals), going 6 1/3 innings and allowing just four hits and no runs. But he was not great over his first two starts (10 2/3 total innings, 9 hits, and 8 earned runs allowed).

For Seattle, it is scheduled to be George Kirby on the mound to start the day. Kirby is 5-3 in ten starts with a 3.45 ERA and a 1.18 WHIP. His ERA has been better on the road so far this season, where he is 2-1 in four starts with a 2.92 ERA and a complete game. However, his OBA is higher on the road (.277) than at home (.230).


 

Kansas City Royals vs Seattle Mariners Form

Table

Teams Pts P W L
24 Seattle Mariners
0.471 119 56 63
27 Kansas City Royals
0.412 119 49 70

Kansas City Royals and Seattle Mariners Latest Matches

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

1/6 (17%)

Defeats

5/6 (83%)

May 22, 2026 - MLB

Kansas City Royals
0 :  2
Seattle Mariners

May 20, 2026 - MLB

Kansas City Royals
3 :  4
Boston Red Sox

May 19, 2026 - MLB

Kansas City Royals
1 :  7
Boston Red Sox

May 18, 2026 - MLB

Kansas City Royals
1 :  3
Boston Red Sox

May 17, 2026 - MLB

St. Louis Cardinals
0 :  2
Kansas City Royals

May 16, 2026 - MLB

St. Louis Cardinals
4 :  2
Kansas City Royals
W L L L L L
Victories

1/6 (17%)

Defeats

5/6 (83%)

May 22, 2026 - MLB

Kansas City Royals
0 :  2
Seattle Mariners

May 20, 2026 - MLB

Kansas City Royals
3 :  4
Boston Red Sox

May 19, 2026 - MLB

Kansas City Royals
1 :  7
Boston Red Sox

May 18, 2026 - MLB

Kansas City Royals
1 :  3
Boston Red Sox

May 10, 2026 - MLB

Kansas City Royals
3 :  6
Detroit Tigers

May 9, 2026 - MLB

Kansas City Royals
5 :  1
Detroit Tigers
L L L L L W
Victories

1/6 (17%)

Defeats

5/6 (83%)

May 17, 2026 - MLB

St. Louis Cardinals
0 :  2
Kansas City Royals

May 16, 2026 - MLB

St. Louis Cardinals
4 :  2
Kansas City Royals

May 15, 2026 - MLB

St. Louis Cardinals
5 :  4
Kansas City Royals

May 14, 2026 - MLB

Chicago White Sox
6 :  2
Kansas City Royals

May 13, 2026 - MLB

Chicago White Sox
6 :  5
Kansas City Royals

May 12, 2026 - MLB

Chicago White Sox
6 :  5
Kansas City Royals
Seattle Mariners
Seattle Mariners Latest matches
L L W L W W
Victories

3/6 (50%)

Defeats

3/6 (50%)

May 22, 2026 - MLB

Kansas City Royals
0 :  2
Seattle Mariners

May 20, 2026 - MLB

Seattle Mariners
5 :  4
Chicago White Sox

May 19, 2026 - MLB

Seattle Mariners
1 :  2
Chicago White Sox

May 18, 2026 - MLB

Seattle Mariners
6 :  1
Chicago White Sox

May 17, 2026 - MLB

Seattle Mariners
3 :  8
San Diego Padres

May 16, 2026 - MLB

Seattle Mariners
4 :  7
San Diego Padres
L L L W L W
Victories

2/6 (33%)

Defeats

4/6 (67%)

May 20, 2026 - MLB

Seattle Mariners
5 :  4
Chicago White Sox

May 19, 2026 - MLB

Seattle Mariners
1 :  2
Chicago White Sox

May 18, 2026 - MLB

Seattle Mariners
6 :  1
Chicago White Sox

May 17, 2026 - MLB

Seattle Mariners
3 :  8
San Diego Padres

May 16, 2026 - MLB

Seattle Mariners
4 :  7
San Diego Padres

May 15, 2026 - MLB

Seattle Mariners
0 :  2
San Diego Padres
L W W L W W
Victories

4/6 (67%)

Defeats

2/6 (33%)

May 22, 2026 - MLB

Kansas City Royals
0 :  2
Seattle Mariners

May 14, 2026 - MLB

Houston Astros
3 :  8
Seattle Mariners

May 13, 2026 - MLB

Houston Astros
4 :  3
Seattle Mariners

May 12, 2026 - MLB

Houston Astros
2 :  10
Seattle Mariners

May 11, 2026 - MLB

Houston Astros
1 :  3
Seattle Mariners

May 10, 2026 - MLB

Chicago White Sox
2 :  1
Seattle Mariners

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

Kansas City Royals

50 %

Seattle Mariners

50 %

May 22, 2026 - MLB

Kansas City Royals
0 :  2
Seattle Mariners

May 3, 2026 - MLB

Seattle Mariners
1 :  4
Kansas City Royals

May 2, 2026 - MLB

Seattle Mariners
2 :  3
Kansas City Royals

May 1, 2026 - MLB

Seattle Mariners
6 :  7
Kansas City Royals

Mar 10, 2026 - MLB Spring Training

Seattle Mariners
4 :  3
Kansas City Royals

Feb 25, 2026 - MLB Spring Training

Kansas City Royals
8 :  8
Seattle Mariners
Kansas City Royals vs Seattle Mariners Picks

Kansas City Royals - Seattle Mariners Key Points

  1. Kansas City leads the all-time series vs. Seattle, 249-241.
  2. Kansas City is 20-31 ATS (run line); Seattle is 19-33.
  3. The Over is 22-29 for the Royals and 23-27-2 for Seattle.
  4. Public Betting: 43% of total tickets and 51% of the handle are on the UNDER.

Our Kansas City Royals vs Seattle Mariners Prediction

Both teams are outing good pitchers on the mound to start the day; good, but certainly not great. However, that may not matter today. The final score in Friday's game was indicative of what we'll likely see in this series. Neither team has been hitting the ball well lately. Kansas City has been hitting .209 over the last week; Seattle has been hitting a league-worst .165. But the Royals, despite hitting better, have recorded just nine runs in their last six games; the Mariners have done better, but still not good with 21 runs in their last six.

Decent pitching and teams that can't hit make it easy to figure out the best bet.

Our Seattle vs. Kansas City Pick: UNDER 8.5

Prediction:

 

UNDER 8.5

-105
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