As far as completion percentage goes, for QBs that started at least 8 games in the 2008 season that was Derek Anderson (started 9 games) of the Cleveland Browns who had a 50.2 completion percentage on 142 completions in 283 attempts.
The 2008 Browns were the only team in the NFL that season to have a team completion percentage of under 50 percent. Brady Quinn started 3 games and had a 50.6 completion percentage (45 completions in 89 attempts), Ken Dorsey started 3 games and had a 47.3 completion percentage (43 completions in 91 attempts), and Bruce Gradkowski started 1 game and had a 33.3 completion percentage (7 completions in 21 attempts).
Matt Cassel, sacked 47 times in 2008.
Joe flacco
Ben Rothlesburger Ben Rothlesburger
Through the 2008 season in the NFL, that is Brett Favre with 310 career interceptions.
quarterback
Tom Brady
Bret farve
Jim McMahon
Kordell "Slash" Stewart
michael vick
Mark Sanchez
Joe Montana