Tampa Bay Rays vs Seattle Mariners Prediction, Odds and Picks for Today, 08/08/25

The Tampa Bay Rays will rely on Drew Rasmussen, an All Star whose 2.81 ERA and 1.02 WHIP highlight his ability to suppress runs and limit hard contact early in games. Although Rasmussen’s innings have been carefully managed this season due to workload concerns, he has shown strong command and efficiency in his starts. Tampa Bay’s pitching approach, combined with Rasmussen’s skill set, has contributed to the team frequently keeping the early innings low scoring, supporting a trend toward unders in the first five innings. Offensively, the Rays are a young team and remain in the middle of the pack when it comes to run production. They are a sneaky team, just not contenders yet.

On the other side, the Seattle Mariners counter with Luis Castillo, who has been equally effective this season with a 3.22 ERA and a string of seven consecutive starts allowing three or fewer earned runs. Castillo’s efficient pitching and strikeout ability make him a tough challenge for opposing offenses early on. Seattle’s strong record of first five innings unders complements Castillo’s performance, suggesting a quiet, controlled start to the game before offense potentially picks up later. Given the pitching matchups and recent trends, the play leans toward the under 4 runs in the first five innings.

Rays vs Mariners Prediction: F5 Under 4 (-115) available at time of publishing. Playable to -125