MLB Sleeper Fantasy Player Predictions for Tuesday (3/31)

Junk of the Marlins

Tuesday, March 31, 2026: Below are three of the best picks for today’s MLB slate on Sleeper 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 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 Sleeper Fantasy for this Tuesday slate.

First… Sign Up to Make MLB Sleeper Fantasy Picks

If you want to play along but haven’t signed up yet, grab a special offer with our Sleeper Fantasy promo code “GRINDERS” to unlock a generous bonus. Sleeper 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 MLB Sleeper picks today, let RotoGrinders do the heavy lifting for you!

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Sleeper Fantasy Top MLB Picks for March 31, 2026

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

White Sox vs. Marlins MLB Sleeper Fantasy Predictions

Janson Junk less than 3.5 Pitcher Strikeouts

The pitcher strikeouts projection for Janson Junk looks like a strong pick based on the current data. The Sleeper projection of 3.5 compares favorably based on our MLB simulations. This pick projects to hit 57.9% of the time based on the assumptions, and that represents an 11.4% edge.

Giants vs. Padres MLB Sleeper Fantasy Predictions

German Marquez less than 3.5 Pitcher Strikeouts

The strikeouts projection for German Marquez looks like a strong pick based on the current data. The Sleeper projection of 3.5 compares favorably based on our MLB simulations. This pick projects to hit 68.7% of the time based on the assumptions, and that represents a 10.2% edge.

Tigers vs. Diamondbacks MLB Sleeper Fantasy Predictions

Casey Mize more than 4.5 Hits Allowed

The hits allowed projection for Casey Mize looks like a strong pick based on the current data. The Sleeper projection of 4.5 compares favorably based on our MLB simulations. This pick projects to hit 65.3% of the time based on the assumptions, and that represents a 6.8% edge.

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

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About the Author

meansy53
Andy Means (meansy53)

Andy Means (aka meansy53) was a walk-on with the esteemed Duke University basketball team for 3 years before graduating in 2004. He also has a Master’s in Accounting from the Indiana University Kelley School of Business and has been playing DFS since 2014 (qualifying for multiple Live Finals). In the summer of 2022, Andy took over the role of Premium Content Director for the RotoGrinders Network, overseeing the vast array of content that is created on RotoGrinders, ScoresAndOdds, and FantasyLabs. Follow Andy on X – @ameansy
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