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MLB Sports Betting Index (SBI) Report – September 3, 2025

mlb sbi sep 3

 

The MLB betting markets are firing on all cylinders right now. According to the Raymond Report Sports Betting Index (SBI), both Favorites and Overs surged yesterday, continuing a bullish short-term cycle. Let’s break it all down:


Straight-Up (SU) Favorites

  • 1-Day: 64% – BULLISH
  • 3-Day: 61.7% – BULLISH
  • 7-Day: 60.1% – BULLISH
  • 1-Month: 56.5% – Neutral
  • YTD: 55.9% – Neutral

📌 Analysis: Chalk is cashing. For three straight days, favorites have cleared 60%, moving into clear bullish territory. Over the last week, SU faves are holding steady at 60%+, signaling a market correction where stronger teams are asserting themselves late in the season.


Totals (Over/Under)

  • 1-Day: 58% Overs – BULLISH
  • 3-Day: 61.7% Overs – BULLISH
  • 7-Day: 52% Overs – Neutral
  • 1-Month: 53.2% Overs – Neutral
  • YTD: 48.6% Overs – Neutral

📌 Analysis: Overs are heating up. After a summer stretch leaning Under, the last three days have produced 61.7% Overs, a clear bullish move. Yesterday’s 58% clip adds fuel to the fire, and with September lineups often featuring tired bullpens, Overs could stay in play.


ATS Favorites (Runline)

  • 1-Day: 64% – BULLISH
  • 3-Day: 66.7% – BULLISH
  • 7-Day: 60.4% – BULLISH
  • 1-Month: 58.1% – BULLISH
  • YTD: 51.3% – Neutral

📌 Analysis: Runline chalk has been the hottest angle of the week. Yesterday, ATS favorites hit 64%, and the 3-day sample is even stronger at 66.7%. This is a bullish run that hasn’t slowed down — bettors riding chalk with the -1.5 spread have been rewarded consistently.


Market Takeaway

  • Favorites: Chalk cycle in full swing — bullish across all short-term windows.
  • Overs: Heating up after a quiet summer; 3-day stretch is bullish.
  • Runline Favorites: Dominant. Consistent 60%+ wins over the last week.

This is one of those rare stretches where favorites and Overs are both in sync, creating high-confidence plays for chalk bettors. September baseball brings playoff urgency, and the SBI is reflecting that edge in the numbers.


📊 Track Daily SBI Reports & Betting Insights → ATSStats.com

 

 

author avatar
Ron Raymond
Ron Raymond is a veteran sports handicapper and founder of ATSstats.com, creator of the Raymond Report sports betting system. Active in the industry since 1996, Ron has nearly three decades of experience analyzing market cycles, performance indicators, and value metrics across the NFL, NHL, NBA, MLB, and CFL. Ron’s data-driven approach has helped thousands of bettors think strategically, manage risk, and win with confidence.