June 18, 2025 7:55 AM EST

Boston Red Sox vs Seattle Mariners 6/18/2025

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The Seattle Mariners are 20-18 at home this season and the Boston Red Sox are 16-20 on the road this season. This is a close match-up with both teams having a 45 to 55 percent chance of winning based on 10,000 game simulations generated one play at a time by the AccuScore Simulation Supercomputer. Both starters have a good chance of having a quality start. Luis Castillo has a 55% chance of a QS and Garrett Crochet a 53% chance. If Luis Castillo has a quality start the Mariners has a 68% chance of winning. His simulated strikeout to walk ratio is 4.6 and he has a 34% chance of having a 5 to 1 K/BB ratio. When he has a 5/1 ratio the Mariners win 53%. If Garrett Crochet has a quality start the Red Sox has a 70% chance of winning. His simulated strikeout to walk ratio is 4.1 and he has a 25% chance of having a 5 to 1 K/BB ratio. When he has a 5/1 ratio the Red Sox win 53%. In simulations we tracked the batter for each team that was most productive based his average hits, walks and RBI per simulation. The most productive batter for the Seattle Mariners is Cal Raleigh who averaged 2.18 hits+walks+RBI. He has a 36% chance of having a big game with 3+ Hits, Walks, RBI and if he has a big game the Mariners have a 62% chance of winning. The most productive batter for the Boston Red Sox is Rafael Devers who averaged 2.28 hits+walks+RBI. He has a 38% chance of having a big game with 3+ Hits, Walks, RBI and if he has a big game the Red Sox have a 68% chance of winning.

CURRENT SEASON: We advise relying on these trends after the first 6 to 8 weeks of the season. UNITS EDGE FAVORS: Seattle Mariners

Boston Red SoxRECORDSeattle MarinersRECORDUNITS EDGE
Record on the Road16-20, 44% -327Record at Home20-18, 53% -292Seattle Mariners
VS Seattle Mariners2-3, 40% -64VS Boston Red Sox3-2, 60% 125Seattle Mariners
vs Team .500 or Better21-21, 50% 88vs Team .500 or Better20-22, 48% -227Boston Red Sox
Record as Road Favorite5-9, 36% -536Record as Home Underdog4-2, 67% 234Seattle Mariners
When Garrett Crochet Starts9-7, 56% -47When Luis Castillo Starts7-8, 47% -268Boston Red Sox

PAST 30 DAYS: We advise incorporating these trends along with the current Season after the first 6 to 8 weeks. UNITS EDGE FAVORS: Boston Red Sox

Boston Red SoxRECORDSeattle MarinersRECORDUNITS EDGE
Record on the Road5-6, 45% 52Record at Home7-7, 50% -177Boston Red Sox
VS Seattle Mariners1-1, 50% 56VS Boston Red Sox1-1, 50% -45Boston Red Sox
vs Team Under .5003-2, 60% 181vs Team .500 or Better3-9, 25% -674Boston Red Sox
Record as Road Favorite1-1, 50% -15Record as Home Underdog0-0 No GamesSeattle Mariners
When Garrett Crochet Starts3-2, 60% 45When Luis Castillo Starts2-2, 50% -81Boston Red Sox

OVER-UNDER TRENDS

Boston Red SoxRECORDSeattle MarinersRECORDO-U EDGE
OVER-UNDER ON ROAD18-17, 51% OverOVER-UNDER AT HOME20-15, 57% OverOVER
ROAD OVER-UNDER PAST 30 DAYS5-6, 45% OverROAD OVER-UNDER PAST 30 DAYS7-6, 54% OverN/A
ROAD OVER-UNDER LAST SEASON44-35, 56% OverROAD OVER-UNDER LAST SEASON32-44, 42% OverOVER
OVER-UNDER IN Garrett Crochet STARTS4-12, 25% OverOVER-UNDER IN Luis Castillo STARTS7-6, 54% OverN/A

ACCUSCORE ADVISOR: AccuScore simulates every game thousands of times one play at a time. We are the industry standard in sports forecasting and the only company to be paid for sports picks and predictions by the biggest sports companies in the world. Our newest product, the AccuScore Advisor, provides Side Value, Money Line and Over-Under picks for every MLB game and rates them as One, Two, Three or Four Star picks. Three and Four Star picks have delivered over +10,000 units of profit the past 2 seasons. Visit AccuScore.com to find out what AccuScore\'s Advisor recommends for this game. The following trends are AccuScore\'s RIGHT-WRONG records and units (+/-) when making picks involving these teams.

SIDE VALUE (Current Season) - Boston Red Sox Road Games: 17-19, 47% -440 Seattle Mariners Home Games: 16-22, 42% -671 SIDE VALUE (PAST 30 DAYS) - Boston Red Sox Road Games: 5-6, 45% +63 Seattle Mariners Home Games: 7-7, 50% -76

MONEY LINE (Current Season) - Boston Red Sox Road Games: 18-18, 50% -379 Seattle Mariners Home Games: 18-20, 47% -639 MONEY LINE (PAST 30 DAYS) - Boston Red Sox Road Games: 3-8, 27% -637 Seattle Mariners Home Games: 7-7, 50% -177

OVER-UNDER RECORD (Current Season) - Boston Red Sox Road Games: 13-19, 41% -790 Seattle Mariners Home Games: 24-11, 69% + 1190 OVER-UNDER RECORD (PAST 30 DAYS) - Boston Red Sox Road Games: 3-7, 30% -470 Seattle Mariners Home Games: 10-3, 77% + 670

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