Indianapolis Colts defensive back Jamie Silva (40) is helped off the field after being injured during the second half of an NFL preseason football game against the San Francisco 49ers in Indianapolis, Sunday, Aug. 15, 2010. (AP Photo/AJ Mast)

Photo by: AJ MAST

Indianapolis Colts defensive back Jamie Silva (40) is helped off the field after being injured during the second half of an NFL preseason football game against the San Francisco 49ers in Indianapolis, Sunday, Aug. 15, 2010. (AP Photo/AJ Mast)