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

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.

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