Mariners vs Tigers Best Bets, Predictions & Splits on June 7

• Seattle threw a shutout yesterday
• Can the Tigers grab the series win?
• Keep reading for my Mariners vs Tigers best bets and predictions

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The Seattle Mariners (33-31) continue their series against the Detroit Tigers (26-38) at Comerica Park today. First pitch is scheduled for 1:40 PM ET. The Mariners come into this afternoon matchup fresh off a 4-0 shutout victory yesterday. That win featured a Dominic Canzone home run, a flawless defensive performance, and a dominant start from Bryce Miller.

Meanwhile, the Tigers are searching for offensive answers. Their lineup managed just two base hits in yesterday’s defeat. The Tigers desperately need core bats like Riley Greene to step up in the batter’s box and spark a turnaround.

When looking for betting value in this matchup, I am targeting the player prop market. The underlying statistical profiles of both starting pitchers highlight a clear edge.

Mariners vs Tigers Prediction & Picks

• Mariners -105 (bet365)

Detroit has been one of the most inconsistent teams in baseball while the Mariners enter with their piggyback pair of Luis Castillo and Bryce Miller. While neither pitcher is in an ideal role, the Mariners have been successful with the duo alternating starts and relief roles. Today, Castillo will start while Miller is likely set to come in as a reliever to finish the game.

The Mariners have played much better lately, taking hold of the AL West. The Mariners are back to being odds-on favorites in AL West odds, ahead of the Rangers and Athletics.

Luis Castillo vs Jack Flaherty

The Tigers hand the ball to Jack Flaherty, who boasts an elite 10.93 K/9 strikeout rate over 57.2 innings. However, his bloated 1.60 WHIP is a direct result of issuing 4.84 walks per nine innings. Flaherty struggles to work deep into games, averaging just 4.4 innings per start.

The Mariners counter with Luis Castillo. The veteran right-hander carries a 5.81 ERA, but his 4.19 FIP suggests he has suffered from unfortunate batted-ball luck. Castillo does not walk many batters (3.38 BB/9), but he is allowing a .282 opponent batting average.

Out of 23 combined starts, Castillo and Flaherty have a total of two quality starts – one each.

Mariners on the Road vs Tigers at Home

The Mariners hold a clear offensive advantage. They generate 4.33 runs and 1.13 home runs per game on the road. In contrast, the Tigers manage just 3.87 runs per game at home. The Mariners also create havoc on the basepaths, swiping 0.60 stolen bases per game compared to the Tigers’ 0.40.

Mariners vs Tigers Odds & Trends

The Mariners entered as -120 road favorites on the moneyline, but the line has shifted to a perfectly even -108 mark for both sides. The runline favors at -1.5 for enticing +152 odds. The Tigers, in contrast, are at +1.5 for -184 odds.

The game total has seen notable line movement. Oddsmakers originally opened the total at 8 runs, but it has since climbed to 8.5. This half-run shift is a direct result of bettors reacting to the elevated ERAs of both starting pitchers. The over is juiced to -120.

Odds as of June 7, 2026, at 11:30 AM ET from FanDuel

I also looked at recent situational trends to find a betting edge. The Mariners are thriving in this spot, while the Tigers continue to struggle:

• The Mariners are 8-2 straight up in their last 10 games (80.0% win rate).
• The Mariners are 7-2 when listed as a betting favorite over their last 10 matchups (77.8% win rate).
• The Tigers are an abysmal 10-19 when closing as the underdog this season (34.5% win rate).

Mariners vs Tigers Public Betting Splits

The MLB public betting splits strongly align with my statistical analysis. In the moneyline market, the Mariners are commanding 67.1% of the total betting handle. This heavy monetary support is matched by the ticket count, as 62.1% of all moneyline wagers back the Mariners.

The Tigers have attracted just 32.9% of the money. Because both the handle and ticket volume comfortably exceed the 60% threshold for the Mariners, there is no sharp divergence. Bettors of all bankroll sizes are fading the Tigers today.

The totals market is even more lopsided. A massive 74.5% of the total money is wagered on the Over. This is paired with 78.0% of the ticket percentage. Bettors expect both bullpens to enter early, creating ample late-inning scoring chances.

Mariners vs Tigers Injury Report Impact

The volume of injuries on the Tigers pitching staff is the most critical factor for my handicap today. With Tarik Skubal, Justin Verlander, and Casey Mize sidelined, their rotational depth is completely compromised.

The Tigers are forced to lean heavily on Flaherty today. High-leverage reliever Kenley Jansen is also on the 15-day IL, leaving their bullpen extremely short-handed. I am upgrading the Mariners’ offensive player props based on this depleted pitching staff.

The Mariners are managing injuries up the middle. Cal Raleigh’s absence removes immense power from the heart of the order. Missing J.P. Crawford also creates a void at shortstop. However, the Tigers missing Javier Baez and Parker Meadows limits their defensive range, giving the Mariners an easier path to stringing together base hits.