Corey Dillon ran the rock a combined 410 times in 2004 at the age of 30 .
Corey Dillon 's yardage totals dropped by more than half at the age of 31 .
Corey Dillon ran the rock a combined 410 times in 2004 at the age of 30 , and his yardage totals dropped by more than half at the age of 31 .