Well, I'll give 2 answers ...
Phil Simms set a Super Bowl record with an 88 completion percentage, 22 completions in 25 attempts, in Super Bowl XXI against the Denver Broncos.
The highest completion percentage prior to Simms was 85.7 percent by Bob Griese in Super Bowl VIII against the Minnesota Vikings. However, Griese only attempted 7 passes in the game and completed 6.
For QBs that attempted at least 20 passes, the highest completion percentage was 73.5 percentage by Ken Anderson of the Cincinnati Bengals in Super Bowl XVI against the San Francisco 49ers. He completed 25 passes in 34 attempts.
troy aikman
Phil simms
New York Giants 39, Denver Broncos 20. Phil Simms throws for 268 yards and 3 touchdowns. He established the super bowl record for highest completion percentage of 88% en route to becoming MVP of the game.
eli manning
Phil Simms 150.9 QB rating in Super Bowl XXI against the Denver Broncos beat the old record of 145.0 set by Jim Plunkett of the Oakland Raiders in Super Bowl XV against the Philadelphia Eagles.
88%. Simms completed 22 of 25 passes for 268 yards and 3 TDs.
Phil Simms of the New York Giants in Super Bowl XXI (22 completions in 25 pass attempts).
Phil Simms had a rating of 150.9 for his 88% completion rate (22/25) in Super Bowl XXI (1987). But running backs Robert Newhouse and Lawrence McCutcheon both had "perfect" 158.3 ratings (1 of 1) for their TD passes in Super Bowls XII (1978) and XIV (1980) respectively. However, they did not meet the minimum 10-attempt criteria for an official rating.
Phil Simms
Zeke Mowatt caught a six yard pass from Phil Simms in the first quarter of Super Bowl XXI
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Phil Simms