Tampa Bay Rays vs Seattle Mariners Picks and Prediction for Saturday August 8 2026
The Tampa Bay Rays will visit the Seattle Mariners on Saturday, August 8, 2026, at T-Mobile Park in Seattle, Washington. First pitch is scheduled for 9:50 p.m. ET, with the game available on ESPN Unlimited and MLB.TV. Tampa Bay enters the weekend at 68-46 overall and 27-28 on the road, while Seattle is 56-60 overall and 33-26 at home. The Mariners are -122 on the moneyline with Tampa Bay at +101, while the total is set at 7.5 runs. Tampa Bay is +173 laying 1.5 runs, while Seattle is -212 getting 1.5. For more MLB predictions throughout the season, check out our free MLB picks.
Starting Pitchers
Tampa Bay is scheduled to start Griffin Jax, who enters at 6-9 with a 3.63 ERA and 1.21 WHIP through 91.2 innings. Jax has allowed 81 hits and 14 home runs while recording 100 strikeouts against 30 walks. He has done a good job limiting baserunners and enters with a slightly better ERA than his counterpart. His ability to generate strikeouts could be particularly important against a Seattle offense that has struggled to consistently produce runs.
Seattle will counter with George Kirby, who is 8-9 with a 3.76 ERA and 1.28 WHIP through 127.0 innings. Kirby has allowed 136 hits and 15 home runs while recording 110 strikeouts against only 26 walks. His control remains a major strength, but opponents have had more success generating hits against him than against Jax. The starting pitching matchup is fairly close, although the numbers give Tampa Bay a slight advantage entering Saturday.
Rays Continue to Set the Pace in the AL East
Tampa Bay enters the weekend at 68-46 overall and 27-28 on the road. The Rays have won four of their last five completed games and enter Friday on a three-game winning streak. Tampa Bay swept Colorado by scores of 13-9, 9-7 in 11 innings and 4-0 after splitting its previous two games against Chicago. The Rays beat the White Sox 1-0 before suffering a 9-1 loss in the following game.
The Rays are batting .258 with a .329 on-base percentage and .403 slugging percentage this season. Tampa Bay has scored 510 runs on 984 hits while hitting 116 home runs. Its pitching staff owns a 3.74 ERA and excellent 1.15 WHIP with 931 strikeouts and 297 walks. Opposing hitters are batting only .230 against Tampa Bay pitching.
Tampa Bay has the much stronger offensive profile in this matchup despite Seattle owning the home-run advantage. The Rays have scored 52 more runs while batting 28 points higher, and they hold advantages in on-base percentage and slugging percentage. Tampa Bay's pitching has also been slightly better, particularly when it comes to preventing baserunners. The Rays enter with advantages on both sides of the ball and have been playing the better baseball recently.
Mariners Hope Home Field Can Make the Difference
Seattle enters the weekend at 56-60 overall but has been considerably better at T-Mobile Park, where the Mariners are 33-26. Seattle is 3-2 over its last five completed games but is coming off an ugly 11-0 loss against Detroit. The Mariners also lost 8-0 during that series but managed a 4-2 victory between the two shutout defeats. Seattle had previously beaten Minnesota 7-6 and 4-3.
The Mariners are batting .230 with a .310 on-base percentage and .377 slugging percentage. Seattle has scored 458 runs on 881 hits while hitting 134 home runs. Its pitching staff owns a 3.82 ERA and 1.20 WHIP with 991 strikeouts and 287 walks. Opposing hitters are batting .243 against Seattle pitching.
Seattle's power and home record give the Mariners a legitimate path to winning this game, but the overall offensive numbers remain concerning. The Mariners have 18 more home runs than Tampa Bay yet have scored 52 fewer runs. Seattle has also been shut out twice over its last three games. Kirby will need to keep the Rays under control because Tampa Bay has been far more consistent at turning baserunners into runs throughout the season.
Tampa Bay Rays vs Seattle Mariners Picks and Prediction
- Pick: Tampa Bay Rays Moneyline (+101)
I'm taking Tampa Bay at +101. Seattle deserves some respect because of its 33-26 home record and Kirby's ability to limit walks, but I don't see enough in the statistical comparison to justify making the Mariners the favorite.
Tampa Bay has the better record, stronger recent form and better offensive numbers. The Rays are batting .258 compared with Seattle's .230 and have scored 510 runs compared with 458 for the Mariners. Jax also owns the better ERA and WHIP in the starting pitching matchup. Getting plus money on the team with the stronger overall statistical profile gives me enough value to back Tampa Bay.
- Pick: Under 7.5 (-123)
I'm taking the Under 7.5 at -123. The number is low, but both starting pitchers have performed well enough to make it playable. Jax enters with a 3.63 ERA and 1.21 WHIP, while Kirby has a 3.76 ERA and has issued only 26 walks through 127 innings.
Seattle's recent offensive performance is the biggest reason I lean Under. The Mariners have been shut out twice over their last three completed games, including an 11-0 loss Thursday. Tampa Bay owns a 3.74 team ERA and 1.15 WHIP while holding opponents to a .230 batting average. The Rays have the stronger offense, but Kirby is capable of keeping them from breaking the game open. I'll take the Under 7.5.
This preview was written prior to game play on Friday.