June 20, 2025 4:40 AM EST

Seattle Mariners vs Chicago Cubs 6/20/2025

AccuScore.com Game Forecast Preview  
Save 10% off membership by using coupon code: PREVIEW

The Chicago Cubs are 24-13 at home this season and are solid favorites to beat the Seattle Mariners who are 17-17 on the road this season. The Cubs have a better than 55% chance of winning based on 10,000 game simulations generated one play at a time by the AccuScore Simulation Supercomputer. Cubs starter Matthew Boyd is forecasted to have a better game than Mariners starter George Kirby. Matthew Boyd has a 54% chance of having a Quality Start (QS) while George Kirby has a 41% chance of a QS. If Matthew Boyd has a quality start the Cubs has a 80% chance of winning. His simulated strikeout to walk ratio is 4.3 and he has a 31% chance of having a 5 to 1 K/BB ratio. When he has a 5/1 ratio the Cubs win 64%. In George Kirby quality starts the Mariners win 62%. He has a 38% chance of having a 5 to 1 K/BB ratio and if he does his team wins 62% of simulations. 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 Chicago Cubs is Kyle Tucker who averaged 2.34 hits+walks+RBI. He has a 40% chance of having a big game with 3+ Hits, Walks, RBI and if he has a big game the Cubs have a 75% chance of winning. The most productive batter for the Seattle Mariners is Cal Raleigh who averaged 2.22 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 56% chance of winning.

CURRENT SEASON: We advise relying on these trends after the first 6 to 8 weeks of the season. NEITHER TEAM HAS UNITS EDGE

Seattle MarinersRECORDChicago CubsRECORDUNITS EDGE
Record on the Road17-17, 50% -53Record at Home24-13, 65% 115Chicago Cubs
VS Chicago Cubs0-0 No GamesVS Seattle Mariners0-0 No GamesN/A
vs Team .500 or Better20-23, 47% -327vs Team .500 or Better23-23, 50% -167Chicago Cubs
Record As Road Underdog8-8, 50% 185Record As Home Favorite20-10, 67% 36Seattle Mariners
When George Kirby Starts2-3, 40% -158When Matthew Boyd Starts7-7, 50% -277Seattle Mariners

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

Seattle MarinersRECORDChicago CubsRECORDUNITS EDGE
Record on the Road3-8, 27% -564Record at Home9-3, 75% 123Chicago Cubs
VS Chicago Cubs0-0 No GamesVS Seattle Mariners0-0 No GamesN/A
vs Team .500 or Better3-10, 23% -774vs Team Under .5006-1, 86% 194Chicago Cubs
Record As Road Underdog1-2, 33% -98Record As Home Favorite9-3, 75% 123Chicago Cubs
When George Kirby Starts2-3, 40% -158When Matthew Boyd Starts3-2, 60% -45Chicago Cubs

OVER-UNDER TRENDS

Seattle MarinersRECORDChicago CubsRECORDO-U EDGE
OVER-UNDER ON ROAD17-16, 52% OverOVER-UNDER AT HOME16-20, 44% OverUNDER
ROAD OVER-UNDER PAST 30 DAYS5-5, 50% OverROAD OVER-UNDER PAST 30 DAYS2-10, 17% OverUNDER
ROAD OVER-UNDER LAST SEASON45-31, 59% OverROAD OVER-UNDER LAST SEASON33-47, 41% OverUNDER
OVER-UNDER IN George Kirby STARTS2-2, 50% OverOVER-UNDER IN Matthew Boyd STARTS5-8, 38% 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) - Seattle Mariners Road Games: 15-19, 44% -328 Chicago Cubs Home Games: 20-17, 54% -506 SIDE VALUE (PAST 30 DAYS) - Seattle Mariners Road Games: 7-4, 64% +334 Chicago Cubs Home Games: 7-5, 58% -201

MONEY LINE (Current Season) - Seattle Mariners Road Games: 15-19, 44% -698 Chicago Cubs Home Games: 25-12, 68% +234 MONEY LINE (PAST 30 DAYS) - Seattle Mariners Road Games: 5-6, 45% -168 Chicago Cubs Home Games: 9-3, 75% +123

OVER-UNDER RECORD (Current Season) - Seattle Mariners Road Games: 9-21, 30% -1410 Chicago Cubs Home Games: 14-19, 42% -690 OVER-UNDER RECORD (PAST 30 DAYS) - Seattle Mariners Road Games: 4-5, 44% -150 Chicago Cubs Home Games: 2-10, 17% -900

Click here to see AccuScore's pick for this game

Save 10% off membership by using coupon code: PREVIEW