⚾ Rangers vs. Mariners Prediction & Picks: MLB Odds for Saturday, April 18

Two teams that figure to battle for the American League West crown all season long do battle as the Seattle Mariners host the Texas Rangers from T-Mobile Park, with first pitch scheduled for 7:15 p.m. ET (FOX). The Mariners are -150 betting favorites despite being shut out in the series opener in a game that features a starting pitching matchup between Nathan Eovaldi and George Kirby.

My Rangers vs. Mariners prediction recognizes how much better Seattle has been at home than on the road, but still finds value with the underdogs. I also expect Brandon Nimmo to continue to spark the Texas offense after homering yesterday, but am backing a Seattle slugger as my top home run wager as part of my MLB picks. 

⚾ Rangers vs. Mariners picks & odds today

See all of our experts’ MLB picks based on the latest MLB odds; picks rated on a 1-to-5 star confidence scale based on betting value.

Total wagered: 2.25 units | Max profit: 3.9 units

🏆 Who will win Rangers vs. Mariners?

The Mariners entered the series with the league’s 28th-ranked team batting average, and were in the bottom half of the league in on-base percentage. Thus, I expect a vintage start from Nathan Eovaldi to wrap up one of the last games on a 10-day West Coast road trip on a high note for the Rangers.

Score prediction: Rangers 4, Mariners 3

💰 Rangers vs. Mariners prediction & best bet

Rangers ML (+125)

When Seattle had scored 69 runs through its first 17 games, 29 of those came during its four-game sweep of Houston. It took advantage of an Astros pitching staff that was in shambles to produce a .422 on-base percentage over the three games, after finishing the first 13 with a .280 on-base percentage. 

Eovaldi allowed 11 runs over his first 8 ⅔ innings this season, but is coming off a dominant outing where he allowed three hits (all singles) in the bandbox of the Athletics’ stadium, while not allowing a single runner to reach third base.

🔥 Best Rangers vs. Mariners player prop bet

Brandon Nimmo Over 1.5 hits + runs + RBIs (+110)

Brandon Nimmo is slashing .313/.396/.538 while starting his Rangers career off strong. His combination of nine extra-base hits and double-digit runs scored and RBIs have led to an eye-popping 1.2 WAR, after only reaching a 5.0 WAR over a full season once prior to this year.

George Kirby is a formidable opponent who has pitched into the eighth inning in back-to-back starts. In addition, he has allowed a .224/.255/.279 slash line in 98 at-bats to current Rangers hitters, with four of the 22 hits going for extra bases. So while that has me hesitant to back a Ranger’s home run props, Nimmo can still fill the stat sheet with big innings in either ways.

💣 Rangers vs. Mariners home run prediction

Julio Rodriguez to hit a home run (+620)

Nathan Eovaldi has been equally as tough on Mariners hitters as Kirby has been on the Rangers. In 107 combined at-bats, he has allowed a .196/.262/.336 slash line, but Julio Rodriguez has been one of the lone Seattle batters that has gotten the best of him.

Rodriguez is 7-for-18 with a home run in his career off Eovaldi, while producing a 1.000 OPS. He is due for positive regression after producing a 19.2% fly ball rate to this point, whereas he finished every other year of his career with a 24% fly ball rate or better.

Though Rodriguez began the year with a 17-game home run drought, Eovaldi’s 1.66 HR/9 rate (eighth-worst among qualified pitchers) lends value to this wager.

🚀 Rangers vs. Mariners same-game parlay

Since I am expecting Brandon Nimmo to provide the offense in a Rangers win, Julio Rodriguez hitting a home run didn't fit the narrative for an effective same-game parlay. That's why I pivoted and changed the third leg to involve the Under for Josh Naylor, who had zero extra-base hits over his first 66 plate appearances despite batting cleanup every game in that span.

💵 My betting record for MLB picks

All MLB picks, including SGPs, have been tracked since March 26.

💡 How I'm betting Rangers vs. Mariners: MLB strategy

Follow all of our MLB analysis and expert predictions for baseball season.

Since I like the Rangers to win, I toyed with the idea of adding extra value with a reverse run line play where I could've gotten +188 odds to lay the 1.5 runs. But I started to get a little worried that the Rangers were nine days into a 10-game West Coast road trip, and instead settled on them to pull the upset even though they went 0-2 in Eovaldi's two starts against Seattle last year.

As usual, I'm devoting a full unit of my bankroll to my best game prediction and player prop wager, while limiting the home run prop pick to 0.25 units. Even though I've been profitable overall, including in both game picks and player props this season, it is important to remember what got me to this point and not get overly aggressive with my wagering despite tasting early success.

📊 Live Rangers vs. Mariners odds

Seattle's moneyline odds range from -142 on the low end of the market at FanDuel to -150 at BetMGM and bet365. Despite being shut out yesterday and running their losing streak to four games, the Mariners are still 38-10 at home against Texas since the start of the 2020 season, and I'd expect them to remain a popular favorite.

All top sports betting sites are in unison with an O/U of 7.0, with the Over juiced from -115 to -122. There is dead even 50/50 betting action at DraftKings as of this moment, so I'd expect the total to stay at 7.0 all day despite the lopsided juice on the Over suggesting the total could tick up.

📈 Rangers vs. Mariners betting trends

🚑 Rangers vs. Mariners injuries

📺 How to watch Rangers vs. Mariners

• Date: Saturday, April 18
• First pitch: 7:15 p.m. ET
• Ballpark: T-Mobile Park (Seattle)
• TV: FOX
• Streaming: MLB.TV
• Rangers starter: Nathan Eovaldi (2-2, 5.40 ERA)
• Mariners starter: George Kirby (2-2, 3.25 ERA)