Super bowl 35.
Craig Morton. Morton started Super Bowl V for the Dallas Cowboys who lost to the Baltimore Colts and Super Bowl XII for the Denver Broncos who lost to the Dallas Cowboys.
Super bowl 3. 1969
Kansas City Chiefs were the fist team to lose a Super Bowl.
Hank Stram of the Kansas City Chiefs who lost Super Bowl I and won Super Bowl IV.
Kansas City Chiefs
The Dallas Cowboys.
Don Shula, who lost Super Bowl III with the Baltimore Colts and Super Bowl VI with the Miami Dolphins.
The first two "Super Bowl"s weren't titled as such, but named so retroactively. Super Bowl III, which saw the New York Jets defeat the Baltimore Colts was the first titled Super bowl, so the first coach to lose would be Don Shula.
The Steelers lost in Super Bowl XXX to the Dallas Cowboys, which was played in Tempe, Arizona.