MLB Underdog Fantasy Player Predictions for Thursday (9/18)
Thursday, September 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.
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 MLB Underdog picks today, let RotoGrinders do the heavy lifting for you!
Underdog Fantasy Top MLB Picks for September 18, 2025
Now that you’re signed up, here are some of our top MLB DFS picks on Underdog for Thursday:
- Tanner Bibee higher than 5.5 Hits Allowed
- Chris Bassitt higher than 5.5 Hits Allowed
- Quinn Priester lower than 5.5 Pitcher Strikeouts
Guardians vs. Tigers MLB Underdog Predictions
Tanner Bibee higher than 5.5 Hits Allowed
The hits allowed projection for Tanner Bibee 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 57.5% of the time based on the assumptions, and that represents a 4.0% edge.
Blue Jays vs. Rays MLB Underdog Predictions
Chris Bassitt higher than 5.5 Hits Allowed
The hits allowed projection for Chris Bassitt 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 56.1% of the time based on the assumptions, and that represents a 1.6% edge.
Angels vs. Brewers MLB Underdog Predictions
Quinn Priester lower than 5.5 Pitcher Strikeouts
The strikeouts projection for Quinn Priester 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 58.9% of the time based on the assumptions, and that represents a 1.1% edge.
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