Red Sox vs Royals Prediction, Odds, Moneyline, Spread & Over/Under for May 18

Odds updated as of 4:11 a.m.

The Boston Red Sox versus the Kansas City Royals is on the MLB schedule for Monday.

Here's everything you need to know before checking out today's MLB odds and spreads on FanDuel Sportsbook.

Red Sox vs Royals Game Info

• Boston Red Sox (19-27) vs. Kansas City Royals (20-27)
• Date: Monday, May 18, 2026
• Time: 7:40 p.m. ET
• Venue: Kauffman Stadium -- Kansas City, Missouri
• Coverage: Royals.TV and NESN

Red Sox vs Royals Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: BOS: (-116) | KC: (-102)
• Spread: BOS: -1.5 (+146) | KC: +1.5 (-176)
• Total: 9.5 -- Over: (+102) | Under: (-124)

Red Sox vs Royals Probable Starting Pitchers

Probable Pitchers: Sonny Gray (Red Sox) - 4-1, 3.18 ERA vs Seth Lugo (Royals) - 1-3, 3.76 ERA

The Red Sox will give the nod to Sonny Gray (4-1, 3.18 ERA), who is eyeing win No. 5 on the season, and the Royals will counter with Seth Lugo (1-3, 3.76 ERA). When Gray starts, his team is 5-2-0 against the spread this season. Gray's team has a record of 4-2 this season when he starts and they are the favorite on the moneyline. The Royals have a 5-4-0 ATS record in Lugo's nine starts with a set spread. The Royals have a 2-2 record in Lugo's four starts this season when they were the moneyline underdog.

Red Sox vs Royals Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Red Sox win (55.5%)

Red Sox vs Royals Moneyline

• Looking at the moneyline for Red Sox-Royals, Boston is the favorite at -116, and Kansas City is -102 playing at home.

Red Sox vs Royals Spread

• The Red Sox are 1.5-run road favorites on the runline against the Royals. The Red Sox are +146 to cover, and the Royals are -176.

Red Sox vs Royals Over/Under

• The over/under for Red Sox-Royals on May 18 is 9.5. The over is +102, and the under is -124.

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Red Sox vs Royals Betting Trends

• The Red Sox have been victorious in 13, or 44.8%, of the 29 contests they have been chosen as favorites in this season.
• Boston has a record of 13-16 in contests when oddsmakers favor them by -116 or more on the moneyline.
• The Red Sox's games have gone over the total in 20 of their 46 opportunities.
• The Red Sox have an against the spread record of 18-28-0 in 46 games with a line this season.
• The Royals have gone 8-12 in games they were the underdog on the moneyline (winning 40% of those games).
• Kansas City has gone 5-10 in games it has played as a moneyline underdog with odds of -102 or longer (33.3%).
• The Royals have had an over/under set by bookmakers 44 times, and have combined with opponents to go over the total in 20 of those games (20-24-0).
• The Royals have gone 19-25-0 ATS this season.

Red Sox Player Leaders

• Wilyer Abreu leads Boston with an OBP of .372, plus a team-best slugging percentage of .459. He's batting .300 on the season.
• He ranks 19th in batting average, 32nd in on-base percentage, and 47th in slugging among all qualifying batters in the majors.
• Willson Contreras leads Boston with 39 hits. He is batting .253 this season and has 15 extra-base hits. He's also slugging .468 with an on-base percentage of .362.
• His batting average ranks 84th among qualified players, his on-base percentage 44th, and his slugging percentage 42nd.
• Contreras heads into this matchup looking to extend his two-game hit streak. During his last five outings he is hitting .211 with two doubles, a home run and two RBIs.
• Ceddanne Rafaela has collected 42 base hits, an OBP of .354 and a slugging percentage of .432 this season.
• Rafaela takes a three-game hitting streak into this matchup. In his last five games he is hitting .357 with two doubles, a home run, two walks and two RBIs.
• Jarren Duran has four home runs, 18 RBI and a batting average of .183 this season.
• Duran heads into this game on a two-game hitting streak. During his last five outings he is hitting .143 with two doubles and a walk.

Royals Player Leaders

• Bobby Witt Jr. has racked up an on-base percentage of .376, a slugging percentage of .492, and has 56 hits, all club-highs for the Royals (while batting .303).
• Including all qualifying hitters in the big leagues, he ranks 11th in batting average, 24th in on-base percentage and 30th in slugging percentage.
• Maikel Garcia is batting .263 with 13 doubles, a triple, three home runs and 19 walks. He's slugging .397 with an on-base percentage of .330.
• Including all qualified players, he is 62nd in batting average, 89th in on-base percentage and 91st in slugging percentage.
• Vinnie Pasquantino is hitting .202 with four doubles, two triples, five home runs and 20 walks.
• Salvador Perez has five doubles, seven home runs and seven walks while batting .205.

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