MLB Best Bets Wednesday, Predictions, Prop Picks Today — August 13

MLB Best Bets Wednesday, Predictions, Prop Picks Today — August 13 article feature image
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Credit: Imagn Images.

Wednesday and Thursday in Major League Baseball are always chock-full of daytime action.

So, grind through your workday with our betting experts' slate of MLB Best Bets for Wednesday, August 13.

Check out all the picks and more 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
Colorado Rockies LogoSt. Louis Cardinals Logo
2:15 p.m.
Boston Red Sox LogoHouston Astros Logo
7:10 p.m.
Labs Logo
2:10 p.m.
Chilly Logo
2:10 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.

Sean Zerillo's Best Bet for Wednesday

Colorado Rockies Logo
Wednesday, August 13
2:15 p.m. ET
MLB.TV
St. Louis Cardinals Logo
Under 9
BetMGM Logo

The Cardinals need young pitching, and Michael McGreevey is a useful back-end arm. He has a six-pitch arsenal with lackluster stuff (90 Stuff+) but excellent command (112 Location+, 3.7% BB). It’s been a limited sample, but I think he can be an effective pitch-to-contact guy with a super-low barrel rate.

On the other side, is this the Austin Gomber revenge game?

The Rockies’ starter has allowed a .958 OPS across 75 head-to-head plate appearances against his former team. However, he’s recently introduced a new pitch mix, presenting a half-decent cutter in favor of his useless fastball. I think that'll help him significantly in the short term.

The Cardinals rank second among MLB lineups in wRC+ against southpaws over the past month. However, I still project their current lineup for a 98 wRC+ against the side. For argument’s sake, I upgraded their lineup to a 107 wRC+ for Wednesday, and I still only project 8.11 runs for this total.

The afternoon start should help the Under, and the Cardinals are off Thursday and can deploy their bullpen as needed.

This game also fits one of our Action Labs Betting Systems, Under Streak:

Check out the rest of Zerillo's MLB Picks in Wednesday's edition of Opening Pitch:

MLB Predictions Wednesday, Expert Picks, Projections for August 13 Image

Pick: Under 9 (-120 | Play to 8.5 -105)



Alex Hinton's Top Player Prop for Wednesday

Boston Red Sox Logo
Wednesday, August 13
7:10 p.m. ET
MLB.TV
Houston Astros Logo
Walker Buehler Under 4.5 Strikeouts
DraftKings  Logo

Red Sox starter Walker Buehler has had a rocky campaign with a 5.40 ERA, but he is coming off his best outing of the season. Last Friday, he scattered four hits across six shutout innings against a Padres team that has won 13 of its past 16 games.

Still, he finished with just four strikeouts in the outing. It was the ninth consecutive start that Buehler has failed to reach five strikeouts.

One of those outings came against Houston just 11 days ago. He went 4 1/3 innings, allowing three runs on nine hits with zero strikeouts, marking the first start in his career he failed to record a single strikeout.

The Astros have also been a difficult team to punch out for several seasons. This season, they boast the seventh-lowest team strikeout rate against right-handed pitching.

Even Cy Young candidate Garrett Crochet failed to reach his strikeout prop in Monday’s matchup with the Astros. It’d be a surprise if Buehler earned five strikeouts on Wednesday.

Check out the rest of Hinton's MLB Player Props in his Wednesday column:

Pick: Walker Buehler Under 4.5 Strikeouts (-150, Caesars)



Wednesday's Featured Bet Labs System

MLB Icon
Evan Abrams / Bet Labs – Unders with Soft Starters and Neutral Winds
the home team's game number is between 37 and 169
the home team's win percentage is between 36% and 65%
the series game # is between 3 and 4
the home pitcher's strikeout rate is between 0.2 and 0.53
the home team's starting pitcher's WHIP is between 1.15 and 2.05
the average wind speed is between 0 and 15 mph
the wind direction is From Right or Left to Right or Right To Left or In or From Left or None or Left To Right
betting on the Under
$11,104
WON
484-341-40
RECORD
59%
WIN%

Powered by our own Evan Abrams, Unders with Soft Starters and Neutral Winds targets regular-season MLB games where softer home starting pitchers (low strikeout rates and moderate WHIPs) are on the mound in games three or four of a series.

By this point in the series, hitters have seen multiple arms, and scouting reports are sharper, yet scoring remains muted when the matchup lacks overpowering velocity and winds remain neutral.

With the home team in the middle of the season grind, winning at a modest clip, the market often overlooks how often these quiet conditions lead to slower-paced, low-scoring outcomes.

Four games on Wednesday fit this system, including Nationals-Royals (Jake Irvin vs. Seth Lugo), Tigers-White Sox (TBD vs. Shane Smith), Twins-Yankees (Joe Ryan vs. Cam Schlittler), and Rays-Athletics (Drew Rasmussen vs. J.T. Ginn).

Picks:

  • Nationals vs. Royals Under 9 (-120, BetMGM)
  • Tigers vs. White Sox Under 8.5 (+105, bet365)
  • Twins vs. Yankees Under 8.5 (-102, FanDuel)
  • Rays vs. Athletics Under 9.5 (-110, BetMGM)


Chilly Bets' MLB Parlay for Wednesday

Need a four-leg parlay for Wednesday's MLB action? Check out our guy Chilly Bets on the Action App, who's logged a four-legger filled with daytime action that pays out at close to 5-to-1.

If you want to add this to your Bet Slip instantly, go ahead and tap on the DraftKings Quickslip below:

Quickslip

Parlay Picks:

  • Brewers ML
  • Royals ML
  • Cardinals ML
  • Tigers ML

Parlay Odds: +468 (DraftKings)



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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