7. Randall Cunningham
To his credit, Cunningham was an amazing athlete and a bit of a pioneer as far as quarterbacks who were mobile and able to use their legs. But despite some incredible highs, including that near-perfect season with the Vikings in 1998, there was a lot of stopping and starting.
After the 1990 season, Cunningham spent more than a decade in the NFL but was never the full-time starter two years in a row from that point forward. Ultimately, Cunningham had plenty of flashes of brilliance during his career but never had the consistency you’d expect of top quarterbacks.