MLB Underdog Fantasy Player Predictions for Thursday (8/21)
Thursday, August 21, 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.
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 Thursday 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 August 21, 2025
Now that you’re signed up, here are some of our top MLB DFS picks on Underdog for Thursday:
- Jose Urena lower than 14.5 Outs
- Justin Verlander higher than 5.5 Hits Allowed
- Michael Lorenzen lower than 4.5 Pitcher Strikeouts
Athletics vs. Twins MLB Underdog Predictions
Jose Urena lower than 14.5 Outs
The outs projection for Jose Urena looks like a strong pick based on the current data. The Underdog projection of 14.5 compares favorably based on our MLB simulations. This pick projects to hit 54.3% of the time based on the assumptions, and that represents a 2.7% edge.
Giants vs. Padres MLB Underdog Predictions
Justin Verlander higher than 5.5 Hits Allowed
The hits allowed projection for Justin Verlander 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 60.3% of the time based on the assumptions, and that represents a 2.5% edge.
Rangers vs. Royals MLB Underdog Predictions
Michael Lorenzen lower than 4.5 Pitcher Strikeouts
The pitcher strikeouts projection for Michael Lorenzen 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 72.5% of the time based on the assumptions, and that represents a 2.0% edge.
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