Rich Gannon threw five interceptions in a Super Bowl loss against which team?

Rich Gannon threw five interceptions in a Super Bowl loss against the Tampa Bay Buccaneers. The game was Super Bowl XXXVII, played on January 26, 2003, when Gannon’s Oakland Raiders lost 48–21 to Tampa Bay at Qualcomm Stadium in San Diego.

Gannon’s five interceptions set a Super Bowl record at the time, and three of them were returned for touchdowns. Tampa Bay’s defense also recorded five sacks, helping the Buccaneers build a 34–3 lead before Oakland scored late. Safety Dexter Jackson intercepted Gannon twice and was named the game’s Most Valuable Player.

The matchup had an unusual storyline because Tampa Bay head coach Jon Gruden had coached the Raiders the previous season. His familiarity with Oakland’s terminology and offensive system was widely discussed before and after the game. Gruden even portrayed Gannon during Tampa Bay’s practice preparations.

The question asks for the opposing team, not the Raiders’ location or the Super Bowl number. The canonical answer is therefore the Tampa Bay Buccaneers, who won their first Super Bowl.