MLB Player Prop Predictions and Lotto Parlay for Thursday [9/21/2023]

MLB player props are one of the most entertaining bet types you can make in 2023. Using sophisticated AI and machine learning predictive analytics for MLB, we're able to identify the best prop bets today to place with your favorite sports books today, Thursday, September 21. Baseball betting is one of the great American pastimes, so let's use the power of machine learning to help us profit from our online sports betting by tailing our MLB player props below - heck, you could even lotto parlay them up to +3993 odds!

Your game not here? Head over to our best MLB prop bets today and source the best plays for your team today. Don't forget to check out our Best Bets for All Sports Today, Thursday, September 21 as well. And before you dive into our props, you should know that it definitely pays to have more than one funded US Sportsbook account when betting on sports.

MLB Player Prop Bets: Thursday, September 21, 2023

Cubs vs. Pirates 7:40PM (EDT)

BET: Miles Mastrobuoni to Get a Hit (-140)

This is the highest edge of any prop our model has found today. Miles Mastrobuoni gets a 73.3% probability of picking up a knock against the Pirates tonight. At odds of -140, this price gives us a 14.9% edge. This is one we should bet with bet365, where new users can turn just $1 into $365 in bonus bets here.

BET: Christopher Morel to Get a Hit (-135)

Our AI machine, DimersBOT, has the Cubs' Morel with a 72.1% chance to record a base knock tonight. At his odds of -135, placing this bet still gives us an edge of 14.7% versus the best sportsbook odds on offer. Grab this at DraftKings where new users can get $200 in bonus bets for just a $5 wager when they sign up. If you already use DraftKings, then you can check out more awesome sportsbook promo codes in our Best US Sportsbooks and Betting Sites section.

Braves vs. Nationals 7:05PM (EDT)

BET: Orlando Arcia To Get a Hit (-175)

Next we move to Atlanta where Orlando Arcia gets a 75.9% probability to get on base with a hit against Washington. Anyone in the Braves lineup is always a threat to move runners on the base paths, and we like Arcia's chances tonight. Compared to our numbers, we have a massive 12.3% edge against the best odds on offer over at DraftKings where new users can get $200 in bonus bets for just a $5 wager when they sign up. 

Phillies vs. Mets 7:15PM (EDT)

BET: Nick Castellanos to Get an RBI (+185)

Nick Castellanos has some great value on him tonight. Sign us up. He gets a 48.4% chance from our model to add to his runs batted in total tonight against the Mets. We get a significant 13.3% edge on another prop we should grab at bet365, where new users can turn just $1 into $365 in bonus bets here.

BET: Kyle Schwarber to Hit a HR (+425)

Let's stick in the same game with a veteran slugger who's due for a home run. DimersBOT has Kyle Schwarber down as a 33.9% chance to hit a home run against the Mets. Schwarber is one of the biggest bats in all of baseball, and has a great chance to hit one out tonight. Our model says this one should be around +300 at worst, so get these excellent odds at bet365, where new users can turn just $1 into $365 in bonus bets here.

Your game not here? Head over to our MLB best props page and source the best plays for your team today.

You can find more MLB props here, and if you're interested in parlaying these, or any other picks, then check out our new parlay picker tool that allows users to generate their own parlays at the click of a button, and with the preferences that matter most to them.

Get ready for an amazing time while also gambling responsibly! Picture it as pure entertainment, not some way to strike it rich quickly. Only wager money that you're totally fine with losing. If you sense that you're taking your luck too far, know when to call it quits and don't be afraid to seek assistance. Keep in mind that gambling is all about having a fantastic experience! If you or someone you know is grappling with gambling issues, reach out to 1-800-GAMBLER for crisis counseling and support. Let the good times roll!