He was down on the field before walking off slowly .
Richt said he believes Gurley injured his knee on his last carry with 5 : 21 to play and Georgia leading 27 - 7 .
Gurley was down on the field before walking off slowly .
Richt said he believes Gurley injured his knee on his last carry with 5 : 21 to play and Georgia leading 27 - 7 .