Luis Castillo heads to the mound for the visiting Seattle Mariners as they face the Tampa Bay Rays. It's time to continue our MLB odds series with a Mariners-Rays prediction and pick.

Mariners-Rays Projected Starters 

Luis Castillo vs. Zack Littell

Luis Castillo (6-8) with a 3.63 ERA and a 1.19 WHIP

Last Start: Castillo went five innings in his last start, giving up eight hits, and two home runs. He allowed five runs in the game as he took the loss to the Cleveland Guardians.

2024 Road Splits: Castillo has not been as good on the road as at home. In eight starts, he is 2-5 on the road with a 4.34 ERA and a .246 opponent batting average.

Zack Littell (2-5) with a 4.20 ERA and a 1.38 WHIP.

Last Start: Littell went five innings in his last start, giving up five hits and two walks. One of the hits was a home run, as he gave up two runs in a no-decision against the Minnesota Twins.

2024 Home Splits: Littell has been much better at home than on the road. He is 20-3 in eight starts with a 3.56 ERA and an opponent batting average of .253.

Here are the MLB Odds, courtesy of FanDuel. 

MLB Odds: Mariners-Rays Odds

Seattle Mariners: -1.5 (+126)

Moneyline: -130

Tampa Bay Rays: +1.5 (-152)

Moneyline: +110

Over: 7.5 (+100)

Under: 7.5 (-122)

How to Watch Mariners vs. Rays

Time: 6:50 PM ET/ 3:50 PM PT

TV: RSNW/BSSUN

Stream: fuboTV (Click for free trial)

Why The Mariners Will Cover The Spread/Win

The Mariners are 21st in the run scored, 28th in batting average, 25th in on-base percentage, and 23rd in slugging. Cal Raleigh has led the way this year. He is hitting just .198 on the year, but he has 12 home runs and 45 RBIs, both the most on the team. He has also scored 28 times. Leading the team in hitting is Julio Rodriguez. He is hitting .260 on the year with a .308 on-base percentage. Rodriguez has just seven home runs, with 29 RBIs, but has stolen 16 bases and scored 36 times. Also having a solid year is Ty Grance. France is hitting .237 with a .332 on-base percentage. He has seven home runs, 27 RBIs, and scored 24 times this year.

Ryan Bliss has been on a hot streak in the last week. In his last week, he is hitting .538 with a .600 on-base percentage. Bliss has three doubles and a triple, leading to five RBIs and a run scored. JP Crawford has also been solid in the last week. He is hitting .261 with a .346 on-base percentage. Crawford has a home run and five RBIs, plus has scored four times. Rounding out the hottest bats is Dylan Moore. Moore is hitting .286 in the last week with two home runs, and four RBIs and has scored six times.

Current members of the Mariners have 26 Career at-bats against Zack Littell. They have hit just .154 against him without an extra-base hit or an RBI. Josh Rojas is the only member of the team with more than one hit against Littell. He is two for five with a walk in his career against Littell

Why The Rays Will Cover The Spread/Win

The Rays are 23rd in the majors in runs scored while sitting 21st in batting average, 17th in on-base percentage, and 27th in slugging. Isaac Paredes leads the way this year. He is hitting .280 on the year with a .365 on-base percentage. He has 11 home runs and 39 RBIS while scoring 29 times this year. Yandy Diaz has also been solid this year. He is hitting .271 on the year with a .331 on-base percentage. He has six home runs and 36 RBIS while scoring 30 times. Scoring plenty this year is Randy Arozarena. He is hitting just .190 on the year with a .304 on-base percentage. He has ten home runs and 27 RBIs while scoring 33 times this year.

Josh Lowe has been solid in the last week. He is hitting .429 in the last week with three home runs and two doubles. Lowe has seven RBIs and five runs scored in the last week. Yandy Diaz has also been great in the week. He is hitting .393 in the last week. He has two home runs and six RBIs in the last week while scoring three times. Rounding out the top bats in the last week is Randy Arozarena. He is hitting .333 in the last week. He has a home run and five RBIs while scoring twice in the last week.

Current Rays have 64 career at-bats against Luis Castillo. They are hitting .250 against him with three home runs and six RBIs. Amed Rosario has been solid against Castillo. He is seven for 20 with a home run and three RBIs. Isaac Paredes has also been solid. He is two for eight with a home run and two RBIs.

Final Mariners-Rays Prediction & Pick

Zack Littell has struggled heavily this year. He has been better at home than on the road, but still not great. The Mariners have Luis Castillo on the mound, and he has struggled on the road this year. The Mariners should get the win in this one, with the better offense as of late.

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Final Mariners-Rays Prediction & Pick: Mariners ML (-130)