Bradshaw falls into an interesting time. His prime years roughly correspond to Staubach's and maybe Griese, and I think most agree that Staubach was better. But according to this group, they're the only two or three quarterbacks worth anything then. Tarkenton, Jurgensen, and Dawson were 10-15 year veterans around this time (and Brodie, Hadl, and Hart). And he preceded the Marino, Kelly, Fouts air-circus days.
I think he suffers most when viewed through the lens of the modern stat hounds. He did a lot of the Brett Favre type throws (20 years before Favre). Like someone said, he didn't care if he missed some deep throws, knowing that hitting 1 out of 5 would result in a touchdown, and the interception 40 yards downfield on third down was a wash. That was OK back then (see Stabler, Bert Jones, Pastorini). Using statistical analysis on an earlier era is pointless (it's like deadball pitchers or steroid-era hitters). You could literally beat the **** out of a receiver back then. You could actually HIT a quarterback without getting their panties wadded up.
I feel like I'm in a rocking chair explaining football in the 70's.