If Quinn is putting up better numbers with the same team, why not start him? (he also had dropped catches)

Is it because he cant throw the long ball?

Just look:

Derek Anderson Brady Quinn

Passing Yds (Rank) 384 (36) 400 (35)

Passing Attempts 84 (31) 74 (35)

Pass Completion 39 (37) 45 (33)

% Pass Completion 46.4 (35) 60.8 (18)

Passing Yds/Attempt 4.57 (36) 5.41 (33)

Passing Touchdowns 1 (36) 1 (36)

% Passes Intercepted 6.0 (35) 4.1 (31)

NFL QB Rating 39.0 (36) 62.9 (32)

300 yd Passing Games 0 (-) 0 (-)

Avg. NFL Rank 31.33 28.11

Only category anderson wins is pass attempts!