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McCown will undergo back surgery Tuesday, Katherine Terrell of the New Orleans Times-Picayune reports.

While it's unknown if McCown's season is over, his availability in the short term is almost certainly in jeopardy, meaning the Saints could soon turn to Garrett Grayson as Drew Brees' primary backup. Once the procedure is complete, the team will likely release a timetable, if any, for his return.

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