An 83% price on over 9.5 is a strong lean toward a slugfest, and this series has the ingredients. The Yankees carry a heavy top of the order into Chase Field, and Nolan Arenado leads the Diamondbacks with 26 home runs in a park that plays fair to hitters. What moves this is the confirmed starters and the roof. A ground-ball arm with the roof closed and calm air pulls the number down fast, while two shaky bullpens in a late-September game with playoff stakes push it the other way. The Yankees sit at 88-64 chasing the AL East, so nobody is coasting. The read hinges on who actually takes the ball.
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