Chicago Cubs vs Seattle Mariners Prediction, 8/22/2026 MLB Picks, Best Bets & Odds

Game: Chicago Cubs vs Seattle Mariners

Date: Saturday, August 22, 2026

Location: T-Mobile Park in Seattle, WA

TV: MLB.TV

Odds/Point Spread: Chicago (-152) Seattle (+126)

The Chicago Cubs (74-54) are traveling to T-Mobile Park on Saturday where they will attempt to beat the Seattle Mariners (60-68). The moneyline on this contest has the Cubs at -152 and the Mariners are at +126. The betting total comes in at 8.5. The expected starting pitchers will be David Peterson and Bryan Woo.

Chicago has a slugging % of .418 and have been called out on strikes 1,100 times, while taking a walk on 544 occasions. They have tallied 617 RBI's and 1,089 hits this year, and their team batting average is sitting at .248. The Cubs have hit 213 two-baggers as a team and have smacked 164 baseballs out of the park. They have 656 runs scored while holding a team OBP of .337. As a team, the Chicago Cubs are scoring 5.1 runs per game, which puts them at 2nd in baseball.

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Their strikeout to walk ratio is 2.55 and their pitching staff has a collective WHIP of 1.26. Cubs pitchers have surrendered 192 home runs in addition to 556 runs (12th in the league). Chicago has surrendered 1,057 hits (8.3 per 9 innings) and 527 earned runs. The Cubs have an ERA of 4.14 so far this season (17th in the league), and their staff has rung up 982 hitters. Their pitching staff has walked 385 hitters and their FIP comes in at 4.69 as a unit so far this season.

Cubs relief pitchers have come into the game with players on base 129 times in addition to having 123 appearances in high leverage situations. The relief pitchers have tallied 47 holds on the season (30th in MLB). The Cubs relief pitchers have a save percentage of 59.2% and have stepped onto the mound in 102 save situations. They have earned 29 saves so far this season and have blown 20 of 49 chances to get a save. The relief pitchers have inherited 178 runners on the season and 30.9% of those runners earned a run for their team. The Cubs have dispatched 412 relief pitchers to the hill over the course of the season.

The Cubs have turned 72.0% of baseballs in play into outs out of 10,302 innings on the field, which has them ranked 2nd in MLB. The Chicago Cubs have 3,434 putouts thus far, in addition to 1,203 assists and 47 errors. Their fielding rate is holding at .990 which has them sitting 1st in the majors, and have a total of 100 double plays.

Peterson has thrown 690 innings and has earned 677 K's so far in his career. His ERA is 4.32 (331 earned runs allowed) and his WHIP is 1.401. He has given up 675 hits (8.8 hits per 9 innings) with 292 free passes. Peterson (40-36 career record) has earned a FIP of 4.25 and he has gone up against 2,990 opposing hitters in the majors.

The Mariners have a team SLG% of .375 and they are earning 3.91 runs per game (30th in baseball). They have put up 156 doubles, while taking a walk 428 times as well as recording 500 runs. Seattle has knocked in 145 home runs this year as well as 483 runs batted in. They have struck out on 1,103 occasions (7th in the league) and have a total of 972 base hits. The Seattle Mariners have tallied an OBP of .310 as well as a team batting average of .230 so far this year.

The Mariners hold a team WHIP of 1.228 in addition to having a FIP of 3.82 as a staff for the season. They rank 19th in the league as a staff in total hits surrendered with 1,060. The Seattle pitching staff have yielded 546 runs on the year while having an ERA of 4.00 (502 earned runs allowed). Their strikeout to walk ratio is 8.60 (1,085 strikeouts vs 326 bases on balls). They have given up 143 homers and they relinquish 4.35 runs per 9 innings (10th in the league).

Sitting with 117 save situations, the Mariners have earned 67 holds and 20 blown saves. Seattle has had bullpen pitchers enter the game in 49 save chances and they have earned 29 saves. Seattle relief pitchers hold an inherited score percentage of 29.9% of 127 inherited runners. Their relievers have stepped onto the mound 132 times in high leverage situations and also on 91 occasions with base runners. They are ranked 22nd in the league with a save rate of 59.2%, and they have sent 386 relievers onto the field this season.

The Seattle Mariners have turned 104 double plays and have a fielding percentage of .985 (17th in the majors). The Mariners have racked up 1,041 assists, 66 errors and have earned a total of 3,387 putouts on the campaign. Out of their 10,161 innings on the diamond, the Mariners have a efficiency on defense of 69.2% (25th in MLB).

Woo (37-23 win-loss record in his career) has earned a 3.44 ERA while surrendering 7.2 hits per 9 innings. He has a K/BB ratio of 4.85 and he has gone up against 2,137 hitters so far in his MLB career. He has conceded 204 ER's while earning a WHIP of 1.009 and a FIP of 3.4. In his pro baseball career, Woo has allowed 429 hits and he has 529 punch outs in 533 innings pitched.

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

Josh Schonwald's Pick: Take Chicago (-152)

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