Tampa Bay Rays vs Seattle Mariners Betting Odds Preview
Rays 6-14 in Last 20 Visits to Seattle, M’s 9-4 Following Day Off

Our MLB predictions for the weekend start with our Rays (55-28) vs Mariners (38-41) betting odds preview. For a split second, the Atlanta Braves took over as the top team in the majors with their early win Wednesday, but Tampa tied the Braves after a late win in Arizona, Wednesday. It was the first time the betting public acknowledged that the Rays may not be the best team in the league. Despite that result, our latest MLB power rankings have the Texas Rangers (49-31) as the top team followed by the Rays. Seattle is in the upper half of the league with a ranking of 14th. Let’s continue our Rays vs Mariners betting odds preview by breaking down each team from a betting perspective.
Rays Causing Some Concern for Bettors
The Tampa Bay Rays opened the season winning 14 straight games and 20 of their first 23, digging a hole for their division opponents early on. Their biggest lead in the American League East was 6.5 games almost three weeks ago. Since Tampa is 35-28, but winners of just six of their last 10. Normally that wouldn’t be a cause for concern but when the team with the best record in baseball struggled to split the recent 4-game series against the Kansas City Royals and the Oakland Athletics, that raised a few eyebrows among bettors.
Tampa will send their ace, Shane McClanahan (11-1, 2.23), to the mound in game one. The lefty is on track to start this season’s all-star game in a few weeks after helping the Rays to a 13-3 record in his 16 starts in 2023. In his last five starts, the Mariners are 3-2, but those two losses were to the Chicago Cubs and Kansas City Royals, two teams McClanahan should have been able to handle easily. Let’s continue our Rays vs Mariners Betting odds preview by turning our attention to Seattle.
Rock Bottom for Mariners
There seems to be a feeling around the Seattle Mariners that most are fed up with the 2023 season after Seattle fell 10.5 games out of first place after losing two of three against the Washington Nationals. It was the third straight series loss and the future doesn’t look great with Tampa coming to town before road dates with the San Francisco Giants and Houston Astros.
Opponents were hitting .309 against Nationals starter Patrick Corbin, but Seattle managed just five singles, three of which were from Tom Murphy. Bryce Miller (5-3, 3.88), coming off a 6-4 loss to the Baltimore Orioles, gets the start for Seattle.
Miller allowed six hits and three earned runs in 4 â…“ innings to stop a two-game quality start run. Miller has run into some difficulty of late allowing 20 earned runs in his last 24.2 innings (7.30 ERA). The Mariners have lost six of their last seven games against teams with a win percentage over .600. We conclude our Rays vs Mariners betting odds preview with a look at the opening number and our official selection.
Public Pounds Rays Early
At a few books early on, Seattle was a small favorite, but that didn’t last long with Tampa now a -127 consensus road favorite. 86% of the tickets came in backing Tampa Bay and almost 99% of the money. The action early is usually professional money with the public putting their cash in the next day. Seattle is 14-6 against the Rays in Seattle and have won four of their last five game one of a series. We can take losing, but the Rays have not looked great against some of the worst teams in MLB. Our official selection is the Seattle Mariners in game one, but try to get as much plus money as possible. That does it for our Rays vs Mariners betting odds preview, we wish you the best with your wagers this weekend.
Updated Odds: Rays (ML -124/+114), (RL SEA +1.5 -150) (RL Rays -1.5 +130) Over/Under (7.5 -105/-115)
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