MLB Underdog Fantasy Player Predictions for Friday (7/18)

Walter of the Astros

Friday, July 18, 2025: Below are three of the best picks for today’s MLB slate on Underdog Fantasy according to our projections team. Using factors like Statcast data, advanced sabermetrics, weather impacts, and environmental factors, every single pick is going to be based on what our projections say is a meaningful edge. Get access to all of these picks, including much more, by subscribing to the RotoGrinders Props & Pick’em package.

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Don’t forget to check out our MLB weather page, which is curated by our Chief Meteorologist, Kevin Roth, to see how that may impact these picks as the day progresses. And you can always stay up to date on exactly what a team’s lineup is by heading to our MLB starting lineups page.

Below, I’ll detail how I’m approaching things on Underdog for this Friday slate.

First… Sign Up to Make MLB Underdog Fantasy Picks

If you want to play along but haven’t signed up yet, grab a special offer with our Underdog Fantasy promo code “GRINDERS” to unlock up to $1,000 Bonus Cash courtesy of a generous deposit match. Underdog Fantasy – one of the most popular DFS pick’em sites – provides player projections for MLB matchups each day. It is then up to the user to decide whether a player will ultimately exceed or fall short of those projections in the games. With a huge roster of players available from which to choose, we just need to make a minimum of two picks to build an entry.

When making your Underdog picks today, let RotoGrinders do the heavy lifting for you!

Underdog Fantasy Top MLB Picks for July 18, 2025

Now that you’re signed up, here are some of our top MLB DFS picks on Underdog for Friday:

Astros vs. Mariners MLB Underdog Predictions

Brandon Walter higher than 4.5 Pitcher Strikeouts

The pitcher strikeouts projection for Brandon Walter looks like a strong pick based on the current data. The Underdog projection of 4.5 compares favorably based on our MLB simulations. This pick projects to hit 70.9% of the time based on the assumptions, and that represents a 4.5% edge.

Athletics vs. Guardians MLB Underdog Predictions

Slade Cecconi higher than 5.5 Hits Allowed

The hits allowed projection for Slade Cecconi looks like a strong pick based on the current data. The Underdog projection of 5.5 compares favorably based on our MLB simulations. This pick projects to hit 54.9% of the time based on the assumptions, and that represents a 3.8% edge with a 1.13x multiplier.

Twins vs. Rockies MLB Underdog Predictions

Chris Paddack higher than 15.5 Outs

The outs projection for Chris Paddack looks like a strong pick based on the current data. The Underdog projection of 15.5 compares favorably based on our MLB simulations. This pick projects to hit 51.1% of the time based on the assumptions, and that represents a 3.3% edge with a 1.21x multiplier.

Editor’s Note: Looking for more places to play? Check out our PrizePicks promo code and Sleeper promo code.

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About the Author

Jbails26
Justin Bailey (Jbails26)

Justin Bailey (aka jbails26) is the Lead Editor for RotoGrinders and FantasyLabs. He’s been playing DFS since 2013 and specializes in small-field NFL and PGA contests (but still dabbles in MME). Justin qualified for the DraftKings Fantasy Golf World Championship in 2023. Follow Justin on X – @justinbailey32