Stan Humphries who was with the Chargers between 1992-1997. Gale Gilbert was the backup QB for that Chargers team (1994 - Super Bowl XXIX).
The 1994 Chargers team won the AFC title and played in Super Bowl XXIX. Their starting QB was Stan Humphries and the backup was Gale Gilbert.
Gale Gilbert was a backup quarterback for the Buffalo Bills for the four years they went to the Super Bowl and lost (Super Bowls XXV-XXVIII) and was the backup quarterback for the San Diego Chargers in Super Bowl XXIX.
The quarterback that was on the most Super Bowl teams was backup Gale Gilbert. He was on the roster of the four Buffalo Bills teams that went to the Super Bowl (Super Bowls XXV through XXVIII) and the San Diego Chargers team that played in Super Bowl XXIX, a total of five Super Bowls. Incredibly, his team lost the Super Bowl each time.
Backup quarterback Gale Gilbert played for the Buffalo Bills the four years they went to the Super Bowl (1991-1994) and played for the San Diego Chargers in 1995 when they went to the Super Bowl.
Once in 1994
As of the 2008 season, the Chargers last, and only, Super Bowl appearance was January 29, 1995 in Super Bowl XXIX when they lost to the San Francisco 49ers, 49-26.