Best MLB Parlay Picks Today: MLB Parlay for May 19
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Best MLB Parlay Picks Today: Luis Castillo Should Dominate the White Sox

Published: May. 19, 2025, 09:00 AM ET
4 min read
Best MLB Parlay Picks May 19

Luis Castillo takes the ball for Seattle against the Chicago White Sox in what should be a blowout victory. I’m backing Seattle as one of my three legs in my MLB parlay. 

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Let’s dive into our three-leg parlay, featuring the Mariners, Phillies, and Giants at +274.

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Mariners vs. White Sox (7:40 PM, EST)

Mariners Moneyline (-205) at FanDuel Sportsbook

The Chicago White Sox are one of the worst teams in baseball. They have been more competitive than the Rockies, but they’re inferior to their opponent nearly every night of the week.

Seattle has posted a solid season thus far, and it should continue on Monday. The Mariners will start Luis Castillo, and he is having a down season, but he can still maneuver Chicago’s lineup.  

The White Sox are hitting just .216 as a team. The most significant offensive difference between these clubs is in the power category. 

Chicago has hit 36 home runs this season, whereas the Mariners have blasted 61. Chicago will have difficulty adding to its total against Castillo, who has surrendered just four home runs in 49.1 innings. 

The Mariners are 13-8 on the road this season, while Chicago is 9-12 at home. This game has Mariners moneyline all over it because of the discrepancies between the two teams. 

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Phillies vs. Rockies (8:40 PM, EST)

Phillies Moneyline (-275) at FanDuel Sportsbook

The Phillies are the largest favorite of the day against the Colorado Rockies. Philadelphia is a strong option for a parlay because the Rockies are horrendous. Therefore, the Phillies shouldn’t have any difficulty winning this game. 

Philadelphia has a massive edge when it comes to starting pitching. Cristopher Sanchez will start for the Phillies, and he is 4-1 with a 2.91 ERA and a 1.22 WHIP. 

Sanchez should shove a Rockies lineup hitting .220 with a .288 team OBP. Kyle Freeland will pitch for Colorado, and he is 0-6 with a 6.15 ERA and a 1.59 WHIP. 

The Phillies haven’t been a great road team at 11-10. However, the Rockies have only won eight games this season and are 5-16 at home. 

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Royals vs. Giants (9:45 PM, EST)

Giants Moneyline (-118) at FanDuel Sportsbook

The San Francisco Giants should be the toughest of the three parlay legs to win on Monday. However, the Giants have won four of their past five games and are 16-7 at home this season. 

They are in a prime spot against the Royals, who have lost four of their past five games. Kris Bubic will pitch for Kansas City, and he has been fantastic, but his stats are slightly elevated on the road. 

Robbie Ray will throw for the Giants. He is 6-0 with a 3.04 ERA and a 1.25 WHIP. Ray has allowed just 37 hits in 50.1 innings, but walks have been a massive issue. 

Backing the hot team at home typically pays dividends, and this is how I’m closing out the Monday MLB parlay. 

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Tanner Kern

Tanner Kern

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