Seattle Mariners vs Kansas City Royals Picks and Prediction for Tuesday, September 16, 2025

By: Garrett Beaverson Published 09/16/2025, 01:10 AM ET
Use Code PPWC

The Seattle Mariners (82–68) visit Kauffman Stadium in Kansas City to face the Royals (75–75) on Tuesday, September 16, 2025. First pitch is scheduled for 7:40 PM ET. Seattle will start Logan Gilbert (4–6, 3.54 ERA, 159 strikeouts in 114 1/3 innings) while Kansas City plans to send out Michael Wacha (9–11, 3.45 ERA). Get in on the action with our free MLB picks.

Mariners Analysis

Seattle has been rolling lately, entering this game on a solid winning streak. Gilbert’s recent starts have been consistent — he’s allowed runs but remains capable of striking batters out in bunches and limiting long damage. Offensively, the Mariners are clicking: Cal Raleigh leads the team with 54 home runs and 115 RBIs, Julio Rodríguez is adding consistent contact and power, and Josh Naylor and Eugenio Suárez provide depth in the lineup. The Mariners’ staff ERA sits around 3.91, placing them ~mid-pack among MLB teams.

Royals Analysis

Kansas City is in a must-win mood, as they try to stay alive in the playoff chase. Wacha’s return from the concussion list is significant, though it’s uncertain whether he’s fully back to his peak form. Offensively, the Royals lean heavily on Bobby Witt Jr., who has 21 home runs, 34 stolen bases, and 77 RBIs, and Vinnie Pasquantino, who’s pushed 30 home runs and over 100 RBIs. The team’s run production is near the bottom of the league (~3.8 runs per game), but they’ve shown fight in recent games. The Royals’ pitching staff has posted a team ERA around 3.73.

Standout Players and Key Injuries

  • Mariners:

    • Cal Raleigh (54 HR, 115 RBI) remains Seattle’s primary run producer.

      Sign Up Get $30 Premium Picks Credit + Exclusive Offers

      Subscribe Now

      I understand that I can unsubscribe at any time. I have read and accepted the Terms & Conditions and Privacy Policy. I consent that Picks And Parlays may use third-party services to process my data.

    • Julio Rodríguez, Josh Naylor, and Eugenio Suárez provide solid secondary offense.

    • Injuries: Gregory Santos (RP, 60-Day IL), Jackson Kowar (RP), Logan Evans, Ryan Bliss, Trent Thornton are among those sidelined.

  • Royals:

    • Bobby Witt Jr. with power, speed, and all-around impact.

    • Vinnie Pasquantino has been one of their few consistent sluggers.

    • Key issue: Michael Wacha was recently on the IL (concussion) and is returning — there’s risk of rust or limited effectiveness early in his outing.

Royals vs Mariners Prediction Reasoning

Seattle enters with momentum and more offensive firepower, especially in the power and extra-base hit departments. Wacha’s return give some hope, but given Gilbert’s recent form and Seattle’s more consistent offense, the edge tilts toward the Mariners. Expect Kansas City to fight, but Seattle should be able to pull ahead.

Final Score Projection: Mariners 6, Royals 4

Best Picks

A broad list of handicappers publishing premium picks across NFL, NBA, CBB, NHL, CFL, and soccer, including Rob Vincilleti, Ben Burns, Mike Lundin, Sean Higgs, Ross Benjamin, and algorithmic teams like Advanced Sports AI.

Ben Burns Billy Coleman Bruce Marshall Bryan Power Chip Chirimbes David Delano David Hess Jackie Mack Jesse Schule Joe Duffy Joseph D'Amico Marc David Mark Ruelle Mark Zinno Mike Fink Mike Lundin Nick Parsons Pro Sports Picks Razor Ray Monohan Ricky Tran Rob Vinciletti Rocky Atkinson Ross Benjamin Sean Higgs Sniper Wes Stephen Nover Steve Seagrave Terry Edelmann The Gold Sheet Tom Macrina Tony Karpinski Trent Bets Will Rogers
logo

If you or someone you know has a gambling problem, crisis counseling and referral services can be accessed by calling 1-800-GAMBLER (1-800-426-2537) (IL). Gambling problem? Call 1-800-GAMBLER (MI/NJ/PA/WV/WY), 1-800-9-WITH-IT (IN), 1-800-522-4700 (CO), 1-800-BETS OFF (IA), 1-888-532-3500 (VA), 1-800-NEXT STEP (AZ), or call/text TN REDLINE 1-800-889-9789 (TN). 21+ (18+ WY). AZ/CO/IL/IN/IA/MI/NJ/PA/TN/VA/WV/WY only. Eligibility restrictions apply. T&C's Apply. Void where prohibited. If you click on a link on this site which takes you to a bookmaker or casino and you subsequently open an account, Pick and Parlays may receive a commission. Bets placed are the responsibility of the bettor.

Follow us

Copyright © 2026 Picks and Parlays. All rights reserved.

The sports news and information contained at this site is for entertainment purposes only. Any use of this information in violation of laws whether they are federal, state and/or local is prohibited. Picks and Parlays is the nation's premier resource for sports betting and handicapping information.

Sign Up Get $30 Premium Picks Credit + Exclusive Offers
Special Offer
Up To $1500 in Bonus Bets Paid Back if your First Bet Does Not Win
Play now Gambling problem? Call 1-800-GAMBLER or 1-800-MY-RESET (Available in the US) 877-8-HOPENY or text HOPENY (467369) (NY) 1-800-327-5050 (MA), 1-800-BETS-OFF (IA), 1-800-981-0023 (PR). 21+ only. Please Gamble Responsibly. See BetMGM.com for Terms. First Bet Offer for new customers only (if applicable). Subject to eligibility requirements. Bonus bets are non-withdrawable. In partnership with Kansas Crossing Casino and Hotel. Promotional offers not available in Mississippi, New York, Ontario, or Puerto Rico.