Boston Red Sox vs Seattle Mariners Prediction, 6/19/2026 MLB Picks, Best Bets & Odds

Game: Boston Red Sox vs Seattle Mariners

Date: Friday, June 19, 2026

Location: T-Mobile Park in Seattle, WA

TV: MLB.TV

Odds/Point Spread: Boston (+162) Seattle (-196)

T-Mobile Park is the location where the Seattle Mariners (38-37) will play the Boston Red Sox (29-43) on Friday. The odds on this game have the Red Sox at +162 and the Mariners are priced at -196. The over/under is set at 8.5. The pitchers taking the mound are Ranger Suarez and Luis Castillo.

As a unit, the Boston Red Sox are notching 3.9 runs per game, which has them at 29th in baseball. They have tallied 279 runs while holding a team OBP of .314. The Red Sox have earned 124 doubles as a team and have knocked 59 balls out of the stadium. They have accounted for 268 runs batted in as well as 586 hits this year, and their team batting average is at .245. Boston has a slugging rate of .381 and have been rung up 587 times, while drawing a walk on 209 occasions.

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They have accrued a K/BB ratio of 2.78 and their pitching staff has earned a collective WHIP of 1.28. Red Sox pitchers have given up 78 home runs and 291 total runs (6th in the league). Boston has surrendered 588 hits (8.5 per 9 innings) and 273 earned runs. The Red Sox have a team earned run average of 3.92 this year (10th in the league), and they have struck out 598 batters. Their pitching staff has walked 215 hitters and their FIP is 3.98 as a unit over the course of the season.

The Red Sox bullpen have compiled a save rate of 71.4% and have entered the game in 56 save situations. They have earned 15 saves over the course of the season and have not converted 6 of their 21 save chances. The relief pitchers have inherited 86 runners this season and 32.6% of those players crossing the plate. Red Sox relief pitchers have entered the game with opponents on base 59 times and also have had 59 appearances in high leverage situations. The Red Sox have dispatched 218 relievers to the hill on the year. The relief pitchers have notched 34 holds so far this year (20th in MLB).

The Red Sox have converted 69.5% of balls in play into outs out of 5,637 innings, which has them sitting at 22nd in pro baseball. The Boston Red Sox have earned 1,879 putouts at this point in the season, as well as 595 assists and 34 errors. Their fielding rate is holding steady at .986 which is 16th in baseball, and have 44 double plays.

Suarez has pitched in 832 innings and is sitting with 775 strikeouts so far in his career. His earned run average is 3.36 (311 ER's allowed) and his WHIP is 1.262. He has allowed 789 base hits (8.5 hits per nine innings) with 261 walks. Suarez (55-40 career record) is the owner of a FIP of 3.31 while facing 3,483 opposing hitters in the majors.

The Mariners have a SLG% of .396 and they earn 4.23 runs per outing (19th in MLB). They have recorded 96 two-baggers, while getting a free base 255 times and racking up 317 runs. Seattle has tallied 96 home runs so far this year as well as 308 runs batted in. They have been called out on strikes on 637 occasions (10th in the league) and have recorded 591 base hits. The Seattle Mariners have an on-base percentage of .317 as well as a batting average of .236 so far this year.

The Mariners hold a team WHIP of 1.192 in addition to having a FIP of 3.64 as a pitching staff over the course of the season. They rank 17th in baseball as a pitching staff in total hits given up with 602. The Seattle pitching staff have given up 297 runs so far this season while having a team ERA of 3.67 (272 earned runs conceded). They currently have a strikeout to walk ratio of 8.70 (646 strikeouts vs 193 bases on balls). They have relinquished 74 home runs and they surrender 4.01 runs per 9 innings (5th in baseball).

Seattle bullpen pitchers have an inherited score rate of 21.1% out of 76 inherited base runners. Their bullpen pitchers have stepped onto the hill 85 times in high leverage situations and on 57 occasions with runners on. With 72 save situations, the Mariners have amassed 41 holds and 13 blown saves. They are ranked 22nd in the league with a save rate of 56.7%, and they have dispatched 228 bullpen pitchers to the hill over the course of the season.

In their 6,003 innings on the field, the Mariners have accumulated a defensive efficiency of 69.7% (18th in pro baseball). The Seattle Mariners have gotten 69 double plays and have notched a fielding percentage of .988 (12th in professional baseball). The Mariners have recorded 606 assists, 33 errors and have amassed 2,001 putouts so far this year.

So far in his pro baseball career, Castillo has conceded 1,275 hits while tallying 1,558 strikeouts in 1,476 innings pitched. Castillo (86-90 career mark) has a 3.62 ERA and has allowed 7.8 hits per 9 innings. He has allowed a total of 594 earned runs while holding a WHIP of 1.187 and a FIP of 3.6. He has a K/BB ratio of 3.26 and he has faced 6,122 batters thus far in his career.

Who will win tonight's MLB game against the spread or moneyline?

Guy Bruhn's Pick: Take Seattle (-196)

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