I don't if Rex Grossman is the worst quarterback in Super Bowl history. He's a contender, but the competition is strong.
Minnesota's Joe Kapp was a tough guy. No matter how hard you hit him, he got up. He had the mentality of a linebacker. He also had the passing ability of a linebacker. Kansas City beat the Vikings 23-7 in Super Bowl IV.
David Woodley, who is known as the Miami quarterback before Dan Marino, hit Jimmy Cefalo with a 76-yard pass to open the scoring in Super Bowl XVII. Miami's only other touchdown came on a kick return. Washington beat the Redskins 27-17.
New England's Tony Eason was terrible against Chicago in Super Bowl XX, but against lesser defenses he was merely bad. Chicago had the best defense I've ever seen, and the Bears beat Eason and the fellows 46-10.
San Humphries of San Diego was not very good. He did, however, throw a touchdown pass in Super Bowl XXIX to cut San Francisco's lead to 49-26.
Folks who contend that a good quarterback is not necessary to win the Super Bowl love to invoke Baltimore's Trent Dilfer. The Colts beat the New York Giants 34-7 in Super Bowl XXXV, and with that defense, all Dilfer had to be was a caretaker. But he was a good caretaker. I'll take him over the other quarterback in the game -- New York's Kerry Collins.
Grossman, meanwhile, is only 26 and has been injured most of his career. And he did play for Steve Spurrier at Florida. So he could grow up to become good.
But he might not. A great fallacy is that he played well in the NFC Championship Game against New Orleans. He was 3-of-12 at the half for 37 yards. His team was winning because the Saints kept giving up the ball.
Grossman didn't show up until late in the third quarter, and in the fourth quarter his 33-yard touchdown pass to Bernard Berrian was a jump ball.
If worst Super Bowl quarterback of all time comes down to Grossman and Kapp, I say Grossman is at the bottom. Kapp was a better tackler.