CHARLOTTE, N.C. — The Carolina Panthers have made an upgrade with their struggling special teams by signing safety Aaron Francisco.

The six-year veteran who played at Kahuku High has played for Arizona and Indianapolis, and had two special teams tackles for the Colts in last season's Super Bowl.

A four-year starter at BYU, the 6-foot-2, 207-pound Francisco went undrafted out of college before signing with Arizona in 2005. He served as the Cardinals' special teams captain in 2007 and '08.

Monday's move is a boost for the Panthers, who ranked near the bottom of the league in punt and kickoff coverage last season.