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The 1984 San Francisco 49ers went 15-1 in the regular season and wound up winning Super Bowl XIX to finish the season with an 18-1 record.

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The 1985 Chicago Bears and the 2007 New England Patriots also won 18 games in a single season.

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The Patriots are the ONLY team to be perfect in the regular and post season's and lose the superbowl They went 16-0 then won their 2 playoff games then lost the Super Bowl

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15y ago

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