Seattle Mariners at Kansas City Royals odds, picks and predictions

Analyzing Friday’s Seattle Mariners at Kansas City Royals odds and lines, with MLB expert picks, predictions and best bets.

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The Kansas City Royals (37-26) welcome the Seattle Mariners (36-28) to Kauffman Stadium Friday for the opener of a 3-game series. First pitch is set for 8:10 p.m. ET. Let’s analyze FanDuel Sportsbook’s lines around the Mariners vs. Royals odds and make our expert MLB picks and predictions for the best bets.

Season series: Mariners lead 2-1

The Mariners have been on a roll, winning 9 of their last 11 games. However, they are just 15-17 on the road this season. Seattle is coming off a 3-0 win over the Oakland A’s Thursday, closing that 3-game series with 2 wins. Seattle’s recent success has helped it surge to 1st in the AL West. It is 31-33 against the spread (ATS).

The Royals are 22-10 at home, the 4th-best record in the MLB. They have struggled as of late, losing 7 of their last 10 and falling to 2nd in the AL Central. Kansas City beat the Cleveland Guardians 4-3 Thursday, closing as a +149 underdog. The Royals are 38-25 ATS, the best run-line record in the majors.

Mariners at Royals projected starters

RHP Bryce Miller vs. LHP Daniel Lynch IV

Miller (5-5, 3.18 ERA) makes his 13th start. He has a 0.96 WHIP, 2.4 BB/9 and 9.0 K/9 in 70 2/3 IP.

  • Last start: Win, 6 IP, 0 ER, 3 H, 1 BB, 9 K in a 9-0 home win against the Los Angeles Angels Saturday
  • 2024 road splits: 1-3, 4.37 ERA (28 1/3 IP, 15 ER), 1.09 WHIP, 8 HR, 6.4 K/9 in 5 starts
  • Career vs. Royals: 0-0, 6.75 ERA (4 IP, 3 ER), 1.75 WHIP, 13.5 K/9 in 1 starts

Lynch IV (0-0, 1.50 ERA) makes his 3rd start. He has a 0.75 WHIP, 1.5 BB/9 and 6.0 K/9 in 12 IP.

  • Last start: Loss, 5 IP, 2 ER, 5 H, 0 BB, 2 K in a 7-6 road loss to the Minnesota Twins on May 30
  • 2024 home splits: 0-0, 0.00 ERA (5 IP, 0 ER), 0.80 WHIP, 0 HR, 10.8 K/9 in 1 start
  • Career vs. Mariners: 0-0, 1.93 ERA (4 2/3 IP, 1 ER), 2.14 WHIP, 7.7 K/9 in 1 start

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Mariners at Royals odds

Provided by FanDuel Sportsbook; access USA TODAY Sports Scores and Sports Betting Odds hub for a full list. Lines last updated at 6:29 a.m. ET.

  • Moneyline (ML): Mariners -130 (bet $130 to win $100) | Royals +110 (bet $100 to win $110)
  • Run line (RL)/Against the spread (ATS): Mariners -1.5 (+126) | Royals +1.5 (-152)
  • Over/Under (O/U): 9 (O: -110 | U: -110)

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Mariners at Royals picks and predictions

Prediction

Royals 6, Mariners 4

Moneyline

BET ROYALS (+110).

The Mariners have been playing well, but that success hasn’t translated to when they’re away from home. Seattle is 3-5 straight up over their last 8 games, and it is 2-3 in Miller’s last 5 starts.

The Royals have up 7 runs in Lynch IV’s last start, but he had a strong outing, allowing just 2 in 5 IP. Kansas City is 8-2 over its last 10 games and has been dominant at home.

Expect that to continue and back ROYALS (+110).

Run line/Against the spread

PASS.

The run-line doesn’t have much value here.

The Royals (-152) are too expensive as a run-line underdog, although that is the preferred play over the Mariners (+126), who are too risky to take as a road favorite.

Over/Under

BET OVER 9 (-110).

The Royals have gone 11-5 O/U in their last 16 games and 4-2 O/U in their last 6. They also went over on Lynch IV’s most recent start.

The Mariners have hit the Over in 2 of their last 6, but they have topped the total in 5 of Miller’s last 6 starts. They have allowed 26 runs in Miller’s last 5 starts.

Couple the recent performance from both teams when this specific pitcher is starting and back OVER 9 (-110).

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