MLB Picks, Best Bets, Props, Predictions Today – August 21

MLB Picks, Best Bets, Props, Predictions Today – August 21 article feature image

Today's MLB slate is a bit lighter with just 9 games on the schedule, but that didn't stop our MLB betting experts from coming through with a variety of picks.

They've looked over today's MLB odds and have come up with predictions for a player prop, a team total, a moneyline, and an over/under. So, continue reading as today's MLB best bets are below.

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MLB Best Bets Today

The team logos in the table below represent each of the matchups that our MLB betting staff is targeting from today's slate of games. Click on the team logos for any of the matchups below to navigate to a specific bet discussed in this article.

GameTime (ET)Pick
Texas Rangers LogoKansas City Royals Logo
2:10 p.m.
Texas Rangers LogoKansas City Royals Logo
2:10 p.m.
Milwaukee Brewers LogoChicago Cubs Logo
2:20 p.m.
Houston Astros LogoBaltimore Orioles Logo
7:15 p.m.
Specific betting recommendations come from the sportsbook offering preferred odds as of writing. Always shop for the best price using our MLB Odds page, which automatically surfaces the best lines for every game.

Bet Labs' Rangers vs Royals Best Bet: Under Showing Betting Value

Texas Rangers Logo
Thursday, August 21
2:10 p.m. ET
MLB.TV
Kansas City Royals Logo
Under 9 (-110)
bet365 Logo

By Bet Labs

The "Silent Sharp Unders" system targets regular-season MLB games in which both teams are performing well, yet the total has quietly dropped from open to close. These are games featuring competent, winning teams with recent success, stable weather conditions, and closing totals in a common scoring range. Despite both teams showing strength, the market subtly favors the under — likely due to matchup specifics or pitching. By following this soft signal — when the public eye is more focused on win streaks than totals — this system finds value in betting against inflated scoring expectations.

Overall, this system is 1290-1030-92 (56%) and has generated a 9% ROI. This season, this system has generated a 4% ROI as it has cashed 55% of its picks (157-129-8).

MLB Icon
Evan Abrams / Bet Labs – Silent Sharp Unders
the temperature is between 34 and 87 degrees
the visiting team's 5 Game recent win percentage is between 40% and 100%
the home team's 5 Game recent win percentage is between 40% and 100%
the closing total is between 7.5 and 10
the home team's game number is between 6 and 162
the visitor team's win percentage is between 46% and 100%
the home team's win percentage is between 46% and 100%
the o/u change from open to close is between -1 and 0
the over/under % is between 1% and 29%
betting on the Under
$20,573
WON
1290-1030-92
RECORD
56%
WIN%

Pick: Under 9 (-110)



Brit Devine's Rangers vs Royals Best Bet: Fade Corbin

Texas Rangers Logo
Thursday, August 21
2:10 p.m. ET
MLB.TV
Kansas City Royals Logo
Royals First 5 Innings Team Total Over 2.5 (+100)
DraftKings  Logo

By Brit Devine

It's taken almost a full season, but Patrick Corbin is finally starting to return to his old form. After a resurgent 2025 season, Corbin has allowed 13 runs over his past three starts, giving up at least three runs in each start and all of them in less than five innings.

Corbin has also been worse on the road this season and worse in day games, while the Royals have been playing marginally better as a team since the All-Star Break. I've been waiting all season for Corbin to regress to the pitcher he has been the past few seasons, and with that time looking to be here, I am going to pounce on the opportunity.

Pick: Royals First 5 Innings Team Total Over 2.5 (+100)

MLB Predictions Thursday, Expert Picks, Projections for August 21 Image


Sean Paul's Brewers vs Cubs Best Bet: Trust Milwaukee

Milwaukee Brewers Logo
Thursday, August 21
2:20 p.m. ET
MLB.TV
Chicago Cubs Logo
Brewers Moneyline (+115)
FanDuel Logo

By Sean Paul

The Cubs are currently -150 favorites, but I just can't get there. Are we underrating Quinn Priester? He's a legitimately strong pitcher. So is Shota Imanaga, but there's a pretty wide divide between the Brewers and Cubs offensively. I'm not letting the past couple of days change a month of results.

Milwaukee is the better team with a pitcher just as good as Imanaga. I'll gladly roll with what I believe to be the best team in baseball at plus money.

Pick: Brewers Moneyline (+115)



Derek Carty's Astros vs Orioles Pick: Value on Altuve's Home Run Prop

Houston Astros Logo
Thursday, August 21
7:15 p.m. ET
MLB.TV
Baltimore Orioles Logo
Jose Altuve Over 0.5 Home Runs (+950)
bet365 Logo

By Derek Carty

There is a value opportunity on Jose Altuve's home runs prop. THE BAT X is projecting 0.16 home runs for him with a 14% chance that he hits at least homer. If you can get the over at +950 or better, there is great value to be had.

Love THE BAT X? Get all of Carty’s sports betting projections at EV Analytics!

Pick: Jose Altuve Over 0.5 Home Runs (+950)




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About the Author
Action Network is a team of seasoned sports betting experts specializing in a broad range of sports, from the NFL and NBA to less mainstream options like cricket and darts. Their staff includes well-known analysts like Sean Koerner and Stuckey, recognized for their accurate predictions and deep sports knowledge. The team is dedicated to delivering expert analysis and daily best bets, ensuring bettors are well-informed across all major sports.

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