He was signed by the Seattle Seahawks, of the NFL, as an undrafted free agent in 1993.
Silvestri has been a member of the Seattle Seahawks (1993), Buffalo Bills (1994), New York Jets (1995–1997), London Monarchs (1995, 1997, 1998), Albany Firebirds (1998–1999), Florida Bobcats (2000) and the Canadian Football League's American expansion team Baltimore Stallions (1993).
On May 7, 1995, Silvestri created history with the London Monarchs after kicking professional football's first four-point field goal, awarded for successful attempts from 50 yards or more in the NFL sanctioned World League of American Football (WLAF).
[5] Silvestri is the only Arena Football League player in history to finish a season with a perfect extra point percentage with the Florida Bobcats in 2000.
[6] Silvestri was a key member of the Arena League champion Albany Firebirds in 1999.