Seattle Mariners vs Chicago White Sox Prediction, 5/9/2026 MLB Picks, Best Bets & Odds

Game: Seattle Mariners vs Chicago White Sox

Date: Saturday, May 9, 2026

Location: Rate Field in Chicago, IL

TV: Chicago Sports Network

Odds/Point Spread: Seattle (-145) Chicago (+125)

The Seattle Mariners (18-20) are hitting the road to Rate Field on Saturday where they will take on the Chicago White Sox (17-20). The moneyline on this contest has Seattle at -145 while Chicago is at +125. The over/under comes in at 8.5. The pitchers taking the mound will be Luis Castillo and Anthony Kay.

Seattle has a slugging rate of .377 and have been rung up 351 times, while being walked on 148 occasions. They have recorded 148 RBI's as well as 286 base knocks over the course of the season, and their team batting average is sitting at .229. The Mariners have accrued 51 doubles as a unit and have knocked 42 baseballs out of the stadium. They have earned a total of 153 runs and have an on-base percentage of .319. As a team, the Seattle Mariners are scoring 4.0 runs per game, which is 25th in the league.

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The Mariners have a team ERA of 3.63 on the year (6th in baseball), and their staff has struck out 318 hitters. Mariners pitchers have conceded 37 home runs and also 149 total runs (7th in MLB). Their pitching staff has walked 93 batters and their FIP sits at 3.70 as a team so far this year. Seattle has conceded 324 hits (8.6 per 9 innings) and 137 earned runs. Their strikeout to walk ratio sits at 3.42 and the pitching staff holds a WHIP of 1.23.

The Mariners have sent 119 relief pitchers to the hill so far this season. The bullpen pitchers have inherited 41 runners this year with 12.2% of those runners ended up crossing the plate. The bullpen have racked up 20 holds this season (20th in the league). Mariners relief pitchers have entered the contest with players on base 31 times in addition to having 49 appearances in high leverage situations. They have earned 11 saves on the season and have not converted 5 of their 16 chances to save the game. The Mariners relief pitchers have accumulated a save rate of 68.8% and have entered the game in 36 save situations.

The Seattle Mariners have notched a total of 1,018 putouts thus far, as well as 322 assists and 15 errors. Their fielding rate sits at .989 which puts them in 7th in the majors, and have accumulated 41 double plays. The Mariners have transformed 68.5% of baseballs in play into outs in their 3,054 innings, ranking them 26th in pro baseball.

Castillo has thrown 1,444 innings and has 1,524 strikeouts during his MLB career. Castillo (84-87 win-loss record in his career) has earned a FIP of 3.57 and he has faced 5,984 batters during his time in the majors. His ERA is 3.62 (581 ER's allowed) and he has a career WHIP of 1.190. He has conceded 1,252 base hits (7.8 hits per nine innings) and has 466 free passes.

The Chicago White Sox have accounted for a team OBP of .322 and a batting average of .229 on the campaign. They have been rung up on 347 instances (7th in the league) and have earned a total of 280 base hits. Chicago has recorded 45 home runs for the year as well as 145 RBIs. The White Sox hold a team SLG% of .380 and they tally 4.19 runs per contest (20th in the league). They have put up 38 doubles, while taking a walk 148 times as well as putting up 155 runs.

The White Sox hold a team WHIP of 1.375 and are the owners of a FIP of 4.40 as a team so far this season. They have a ranking of 12th in MLB as a staff in total hits relinquished with 295. The Chicago pitching staff have conceded 171 runs so far this season while holding a team ERA of 4.24 (154 earned runs allowed). They have earned a K/BB ratio of 8.10 (294 strikeouts against 155 bases on balls). They have given up 38 homers and they relinquish 4.70 runs per 9 innings (19th in the league).

With 33 save situations, the White Sox have tallied 13 holds and also 9 blown saves. Chicago has had relievers enter the game in 20 save chances and they have converted 11 saves. Chicago relievers hold an inherited score percentage of 30.0% out of 70 inherited base runners. Their relief pitchers have taken the field 39 times in high leverage situations and also on 46 occasions with runners on base. They rank 23rd in MLB with a save rate of 55.0%, and they have dispatched 130 relief pitchers onto the diamond on the campaign.

In 2,949 innings on the field, the White Sox have a efficiency on defense of 70.6% (13th in the majors). The Chicago White Sox have turned 30 double plays and have a fielding percentage of .987 (11th in professional baseball). The White Sox have 337 assists, 17 errors and have 983 putouts this season.

In his pro baseball career, Kay has allowed 125 hits and he has 108 strikeouts in 115 innings. Kay (5-3 mark in his career) is the owner of a 5.63 earned run average while allowing 9.8 hits per nine innings. He has given up 72 earned runs while earning a WHIP of 1.625 and a FIP of 5.5. He has a K/BB ratio of 1.74 and he has faced 536 batters so far in his career.

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

Tony Sink's Pick: Take Chicago (+125)

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