Mariners vs. Royals Dunkel MLB Picks, Predictions and Prop Bets - May 3

The Kansas City Royals will look to finish off a sweep of a three-game series versus the Seattle Mariners, at 4:10 p.m. ET on Sunday. Luis Castillo (0-2, 6.35 ERA) gets the start for the Mariners, who are 16-18 this season and third in the AL West. Kris Bubic (2-1, 3.74 ERA) is expected to start for the Royals, who are 14-19 and fourth in the AL Central.

The Mariners (-140) are moneyline favorites at home over the Royals (+118). The game has an over/under of 8 runs.

Mariners vs. Royals Odds, Game Time

• Game day: Sunday, May 3, 2026
• Game time: 4:10 p.m. ET
• Location: Seattle, Washington
• Stadium: T-Mobile Park
• Favorite: Mariners (-140)
• Underdog: Royals (+118)
• Over/under: 8

How to Watch Mariners vs. Royals

• TV Channel: SEAM and ROYL
• Live Stream: Fubo (Watch for free)

Bet now on FanDuel Sportsbook!

Mariners vs. Royals: Betting the Moneyline

• The Mariners have compiled a 15-15 record in games they were favored on the moneyline (winning 50% of those games).
• Kansas City has won in five, or 29.4%, of the 17 contests it has been named as odds-on underdogs in this year.
• Seattle is 10-8 this season when entering a game favored by -140 or more on the moneyline.
• The Royals have a mark of 1-5 in contests where sportsbooks favor them by +118 or worse on the moneyline.
• The Mariners have a 58.3% chance to win this matchup based on the moneyline's implied probability.
• The moneyline set for this matchup implies the Royals have a 45.9% chance of coming away with a victory in the contest.

Mariners vs. Royals: Betting the Spread & Total

• The Mariners have had an over/under set by oddsmakers 34 times, and have combined with opponents to go over the total in 16 of those games (16-17-1).
• Kansas City and its opponents have gone over the total this season in 14 of its 33 opportunities.
• The Mariners have a 12-22-0 record against the spread this season (covering only 35.3% of the time).
• The Royals are 14-19-0 against the spread in their 33 games that had a posted line this season.