Through Super Bowl XLIII, that is John Elway with 5 (SBs XXI, XXII, XXIV, XXXII, and XXXIII).
Paul Hornung of the Green Bay Packers wore number 5 in the first super bowl in 1967. I don't think he played in either game but Pittsburgh's backup quarterback for Super Bowls IX and X, Terry Hanratty, wore number 5.
Jim plunket Oakland raiders
joe Montana 16
Hall of Famer Dan Marino wore the 13 jersey for the Miami Dolphins. Marino can arguable be the best quarterback to play the game without a Super Bowl victory.
Uniform number 12 has been worn by 25 starting super bowl quarterbacks, 15 winners and 10 losers. The numbers are skewed a little bit by the fact that Terry Bradshaw and Roger Staubach both appeared in so many super bowls. The next closest is number 7, worn by 5 winners and 7 losers for a total of 12 starting quarterbacks.
Colts elect to wear blue jerseys in Super Bowl XLIV; Saints to wear white
No Steelers player wore #6 in Super Bowl XIII, which was played on January 21, 1979. The #6 was worn by Jim Elliott in 1967 and then again by Bubby Brister from 1986-1992.
Marino was never in the superbowl
Two Super Bowl Quarterbacks have worn #13. Miami Dolphins qb Dan Marino (Super Bowl XIX, loss) ST. Louis Rams/Arizona Cardinals qb Kurt Warner (Super Bowls XXXIV - win, XXXVI - loss, XLIII - loss).
The highest number a quarterback can wear in the NFL is 19, which was worn by Johnny Unitas, who played for the Baltimore Colts.-----The highest jersey number that I can remember was #60 worn by Otto Graham of the Cleveland Browns of the All-American Football Conference. John Hadl of the Chargers and Rams wore #21 during his career in the 60s and 70s. But since the merger in 1970, the highest number a quarterback on the roster can wear is 19.
Although they were the designated home team for Super Bowl XL, the Steelers chose to wear white jerseys because they had worn them in their three previous road wins in the playoffs.