MCGRAW'S END IN SIGHT!

Fears his broken-down body will make him hang up his spurs

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FEEBLE Tim McGraw has canceled an upcoming performance in Colorado after a slew of recent surgeries on his back and knees, and now there are genuine fears he may never get back on his feet and perform again, sources reveal.

The 58-year-old country crooner was poised to open the two-day Professional Bull Riders Last Cowboy Standing event at Canvas Stadium in Fort Collins, but sources say he was in “too much pain.”

Tim's wife, Faith Hill, is worried, a source says