Rivalry games love to pretend they follow their own rules, but this matchup between Army and Navy feels ready to break formation.

Every season gives us a familiar script, yet something about this game hints that the usual path might not hold. Before you assume another predictable finish, it's worth looking at what actually drives the numbers underneath.

This year has a different engine.

Army at Navy -6

Saturday, Dec. 13, 3 p.m., CBS

Records: Army 6-5, 0-0 vs. AP teams; Navy 9-2, 1-1 vs. AP teams

Opening Line: Navy -4.5, O/U 38.5

Money line : Army (+200); Navy (-245)

Over/Under: 37.5 (O -118, U -102)

Army: Built to control without the tools to create it

Army football's entire identity depends on being efficient but their data expose a team that operates with fragility.

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