Why do a lot of people still label Peyton Manning a choker? he has at least won a Super Bowl before, unlike?

Jim Kelly and Dan Marino. Jim Kelly lost 4 Super Bowl's in a row with the Bills, meanwhile, Dan Marnio only played in 1 Super Bowl in which his Dolphins were slaughtered by the 49ers. Also Fran Tarkenton of the Vikigns lost 3 Super Bowls in the 1970's(the Vikings are 0-4 in the Super Bowl just like the Bills, their first of 4 Super Bowl losses was before Tarkenton was the QB).