I love how you bolded the stats that Campbell did the best in, while leaving more important stats unemphasized. Kinda tells it's own tale
Here's the truth, Campbell's career averages (stats that can be compared to other QB's regardless of number of games played) among 38 active QB's:
TD percentage: 3.4% tied for 30th out a 38 active QB's (utterly horrible, JP Losman is more likely to throw a TD on a given passing play, reflects unwillingnes to take chances)
Completion %: 61.2% 18th
(decent, but improved by his tendency to check down too often, also shows his unwillingness to take chances)
Yards Per Attempt: 6.6 tied for 26th
(reflects his tendency to check down)
Yards per completion: 10.8 tied for 33rd out of 38
(really reinforces the fact that he tends to be too timid and checks down too quickly and too often)
Interception % 2.3% tied for 4th of 38
(Fantastic! freakishly high for a mediocre QB... because he's checking down too often which means less risk of interception)
Pass Attempts per game: 31.5 11th
(interesting that he's 11th in attempts while being so low in yards per completion, if it needed reinforcement, then this is cement).
Everything in his stats points to the QB he really is, a mediocre QB, a nice guy, a tough guy, but overly conservative, hessitant and timid with his decision making.