MLB Same-Game Parlay Predictions: Our Best SGP Picks for Saturday, July 18

Quinn Allen - Betting Analyst at Covers.com
Quinn Allen • Betting Analyst 7+ years betting experience
Updated: Jul 18, 2026 , 09:25 AM ET • 4 min read

Trevor Rogers will continue to dominate, while Gabriel Moreno stays hot at the dish.

Trevor Rogers of the Baltimore Orioles MLB
Photo By - Reuters Connect. Trevor Rogers of the Baltimore Orioles MLB

It's a busy Saturday across the Majors, and there's no shortage of intrigue in my same-game parlay predictions. 

I'm eyeing another gem from Trevor Rogers, while two struggling starters present value in a higher-scoring game at T-Mobile Park in Seattle. 

See more in my MLB picks for Saturday, July 18.

Today's best MLB SGP picks

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Orioles at Astros SGP: Rogers Continues to Deal

Trevor Rogers has really turned a corner over the last month. The left-hander owns a 3.02 FIP over his last four outings, and has allowed Under 2.5 earned runs in five straight appearances.

Across his last two starts, the southpaw has given up just one earned run. 

However, one hitter who could have some success against him tonight is Yordan Alvarez. The slugger has a .286 average against left-handed hurlers, and he's cashed the Over in total bases in four of his previous five contests.

Alvarez also owns a .400 ISO over the last two weeks. 

Gunnar Henderson has five hits in his last four games, and Houston Astros starter Spencer Arrighetti is in horrible form, compiling a 9.10 FIP in the last month. 

  • Time: 4:10 p.m. ET
  • Where to watch: MASN, SCHN

See full analysis of this game in our Orioles vs. Astros predictions.

Cardinals at Diamondbacks SGP: Pfaadt Carves Up Struggling Cards

Brandon Pfaadt is dominating lately for the Arizona Diamondbacks, compiling a phenomenal 2.50 xERA across his last four outings while allowing just 0.57 BB/9 and HR/9.

Pfaadt hasn't allowed more than two earned runs in a single outing since May 17, and tonight's matchup is a clear opportunity to keep dealing. The St. Louis Cardinals are in horrible offensive shape, posting a 64 wRC+ over their last 11 games. 

Gabriel Moreno is one of Arizona's hottest hitters at the moment, batting .405 over his last 10 contests. The catcher has three multi-hit games in his previous four games, and Dustin May is vulnerable to hard contact right now, allowing a 42.9% hard-hit rate over the last month. 

  • Time: 4:10 p.m. ET
  • Where to watch: Cardinals.TV, DBacks.TV

See full analysis of this game in our Cardinals vs. Diamondbacks predictions.

Giants at Mariners SGP: High-Scoring Affair in Seattle

The Over has appeal tonight in Seattle. Logan Webb enters in poor form, posting a 4.82 FIP over his last four outings, and he has allowed 12 earned runs across his previous two starts.

Bryan Woo has a 4.05 xERA over the last month, which is manageable, but he has allowed at least two earned runs in back-to-back outings. With the total sitting at just seven, scoring could build before the bullpens fully factor in.

Bryce Eldridge has scored six runs in his last 10 contests, including three straight, and San Francisco owns an 119 wRC+ over the last two weeks. Josh Naylor is also riding a nine-game hitting streak.

  • Time: 8:08 p.m. ET
  • Where to watch: FOX

See full analysis of this game in our Giants vs. Mariners predictions.

Quinn Allen's 2026 Transparency Record
  • SGP picks: 4-18, -2.66 units

Odds are correct at the time of publishing and are subject to change.
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Quinn Allen - Covers
Betting Analyst

Quinn Allen is an experienced sports journalist from Vancouver, Canada who fell in love with sports by the time he could walk. He proceeded to play high-level baseball and soccer growing up and eventually played college baseball in the United States.

After his career ended, Quinn received his broadcast journalism degree from BCIT and has since written for many sports publications including ClutchPoints, Gino Hard, and RG, where he plies his trade as a writer and editor.

Quinn's favorite team is Chelsea FC and he'd like to watch a match at Stamford Bridge one day. He loves to bet on NBA player props and encourages others to bet responsibly and not chase losses.

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