6. Steve DeBerg
Early in his career DeBerg came close to being the starter for San Francisco, but was replaced by Joe Montana. The same situation happened in Denver, until John Elway arrived. Despite playing second fiddle to some the game's very best QBs, DeBerg still had his moments. When he did see the field DeBerg passed for over 34,000 career yards, and ranks in the top 20 all-time for attempts, completions and yards passing. (AP Photo/Bill Kostroun)
The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.