During their 21-year existence, the Baltimore Ravens have been beaten by 30 of the other 31 franchises in the NFL.
The only team that has failed to upend the Ravens: the Cowboys, who play host to Baltimore on Sunday. The Ravens are 4-0 against the Cowboys, and each victory has been a significant one for Baltimore.
In 2000, the Ravens shut out Troy Aikman and the Cowboys, 27-0, for their fourth shutout of the season. The Baltimore Sun headline said it all: Big D runs into bigger 'D.'
In 2004, Baltimore routed Dallas again, beating the Cowboys, 30-10 behind Kyle Boller's two touchdown passes.