Tampa Bay Rays vs Seattle Mariners Prediction, 8/8/2025 MLB Picks, Best Bets & Odds

Game: Tampa Bay Rays vs Seattle Mariners

Date: Friday, August 8, 2025

Location: T-Mobile Park in Seattle, WA

TV: Root Sports Northwest

Odds/Point Spread: Tampa Bay (+132) Seattle (-160)

T-Mobile Park is the location where the Seattle Mariners (62-53) will attempt to beat the Tampa Bay Rays (57-59) on Friday. The odds on this game have Tampa Bay at +132 while Seattle is coming in at -160. The over/under is set at 9. The starting pitchers will be Drew Rasmussen and Luis Castillo.

Tampa Bay is slugging .399 and have struck out 982 times, while taking a walk on 344 occasions. They have accumulated 492 runs batted in in addition to 985 hits on the year, while their average at the plate comes in at .252. The Rays have hit 173 doubles as a unit and have hit 126 balls out of the stadium. They have earned a total of 522 runs and hold an OBP of .315. As a team, the Tampa Bay Rays are putting up 4.5 runs/g, which is 12th in MLB.

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The Rays are sitting with a team ERA of 3.86 for the year (13th in the league), and the staff has struck out 980 hitters. Rays pitchers have given up 147 home runs in addition to 475 runs in total (12th in the league). They have walked 330 opposing players and their FIP comes in at 4.16 as a team for the year. Tampa Bay has allowed 917 base hits (8.0 per 9 innings) as well as 441 earned runs. Their K/BB ratio is 2.97 and the pitching staff has recorded a WHIP of 1.21.

Rays bullpen pitchers have entered the contest with runners on base 83 times in addition to having 112 appearances in high leverage situations. The bullpen have a total of 65 holds so far this year (15th in the league). The Rays relievers have compiled a save rate of 55.6% and have entered the game in 111 save situations. They have recorded 25 saves so far this year and have blown 20 of 45 save opportunities. The relief pitchers have inherited 121 base runners so far this season with 35.5% of them ended up crossing the plate. The Rays have dispatched 364 relief pitchers to the mound for the year.

The Rays have turned 70.9% of balls in play into outs out of their 9,258 innings, which has them ranked 8th in pro baseball. The Tampa Bay Rays have a tally of 3,086 putouts this season, in addition to 1,032 assists and 54 errors. Their fielding percentage is holding at .987 which puts them in 10th in pro baseball, and have 111 double plays.

Rasmussen (29-17 win-loss mark in his career) holds a FIP of 2.88 while he has faced 1,666 batters during his time in the major leagues. He has conceded 339 base knocks (7.3 hits per 9 innings) and has had 107 free passes. His ERA is 2.92 (135 ER's allowed) and his career WHIP is 1.074. Rasmussen has pitched in 415 frames and has 394 strikeouts in his MLB career.

The Seattle Mariners have a team on-base percentage of .320 in addition to a team batting average of .244 over the course of the season. They have struck out on 1,022 occasions (4th in the league) and have 958 base hits. Seattle is sitting with 164 home runs for the season as well as 506 runs batted in. The Mariners hold a team slugging % of .412 and they are scoring 4.58 runs per outing (10th in baseball). They have tallied 154 doubles, while walking 390 times as well as putting up 527 runs.

The Mariners have a team WHIP of 1.242 in addition to having a FIP of 4.05 as a pitching staff on the season. They currently have a K/BB ratio of 8.40 (977 strikeouts vs 348 walks). They come in at 20th in the league as a staff in total hits allowed with 946. They have given up 133 dingers and they allow 4.30 runs per 9 innings (16th in the league). The Seattle pitching staff have given up 498 runs so far this season while having a team ERA of 3.85 (446 earned runs conceded).

Seattle has had bullpen pitchers enter the contest in 47 save opportunities and they have come away with 28 saves. They are currently ranked 20th in baseball holding a save percentage of 59.6%, and they have dispatched 383 bullpen pitchers to the hill on the season. Their bullpen pitchers have come in 160 times in high leverage situations and on 96 occasions with runners on. Seattle relievers hold an inherited score rate of 25.2% out of their 103 inherited runners. Sitting with 108 save situations, the Mariners have recorded 61 holds in addition to 19 blown saves.

The Seattle Mariners have turned 87 double plays and own a fielding percentage of .989 (4th in baseball). The Mariners have accrued 972 assists, 46 errors and have 3,128 putouts for the season. Out of their 9,384 innings on the field, the Mariners have accumulated a defensive efficiency of 70.7% (10th in the majors).

Thus far in his career, Castillo has conceded 1,162 base knocks and he has 1,446 strikeouts in 1,361 innings. He has surrendered 533 earned runs while earning a WHIP of 1.180 and a FIP of 3.5. He has a K/BB ratio of 3.26 and he has gone up against 5,627 hitters in his pro baseball career. Castillo (81-82 career win-loss mark) has earned a 3.52 earned run average while allowing 7.7 hits per nine innings.

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

Tony Sink's Pick: Take Tampa Bay (+132)

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