Yordan Alvarez Under 1.5 Total Bases: MLB AI Pick for September 10, 2026

Yordan Alvarez and the Houston Astros visit the Philadelphia Phillies this afternoon, first pitch at 12:05 PM, and Rithmm's models are flagging his total bases line as one of the cleaner under reads on the MLB prop board.

The pick is Alvarez Under 1.5 Total Bases at -129. Win probability sits at 59.2% with a +6.6% Edge, and the prop is tagged Elite Edge in-app. The models lean under at about 59% win chance on the Bet Info stack, so the read lives on the under side of the number rather than a blowout projection. That is still enough separation versus the book-implied price for the under to clear as a real Edge.

What makes this card different is that Alvarez's own total-bases unders already carry a strong seasonal sample on top of the broader September under buckets Rithmm tracks. His total-bases unders have gone 14-8 (63.6% win rate, +12.8% ROI across 22 bets), and the recent half of that sample is heating at 10-3. September total-bases unders sit 64-34 (65.3% win rate, +14.6% ROI across 98 bets). Elite Edge total-bases unders are 94-55 (63.1% win rate, +10.6% ROI across 149 bets). Unders in the 5 to 10% Edge band with the Elite Edge tag are 74-42 (63.8% win rate, +12.9% ROI across 116 bets). Designated hitter total-bases unders in the 57 to 60% win-probability band are 35-22 (61.4% win rate, +9.5% ROI across 57 bets). Alvarez is sitting on that stack at once: his own under history, September slate, Elite Edge tag, and the DH probability band.

For a 1.5 total bases under, the path is simple. One single and he is still under. An extra-base hit or a multi-hit night cashes the over. The models lean toward the quieter path, and the samples above are where similar priced unders have paid this season. Shop the number before you lock it. A few cents of juice on a -129 under still matter when you are stacking this as a single or a leg.

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Lock in Alvarez Under 1.5 Total Bases this afternoon, size it for the juice, and see what else the models are flagging across the board.