Bob's in the HOF were he belongs. How could he be underrated ?
I frequently hear people say stuff like "Griese got carried by a great team" and "Morrall quarterbacked most of the games in the 72 season."
Bob was a GREAT quarterback. I do think he is underrated both by Dolphins fans and NFL fans in general both because he never put up gaudy stats and because the next Hall of Fame QB we had after him did.