If you say so, but he must be the luckiest backup on the planet, because everywhere he goes, he seems to start a lot of games.
Based on what? At least put some effort into the argument, your opinion is not supported by fact. David Carr's last season as a starter - his fifth in the league - will end up being worse than Cassell's based on projected numbers at this point. And that was Carr's best season. Rosenfields is a tool that makes dumb ass decisions that costs his team games, hence why he didn't make it in Miami and why he can't beat out another guy that costs his team games with bad decisions with the Texans. You give an offense like ours to guys like that, we lose consistently 41-30 week in and week out.
Cassel (based on this season projected numbers over 16 games)
Att: 443
Comp: 293
Comp rate: 66%
Yards: 2920
TD: 16
Int: 11
Sacks: 66
20+: 27
40+: 5
Carr
Att: 442
Comp: 302
Comp rate: 68%
Yards: 2767
TD: 11
Int: 12
Sacks: 41
20+: 25
40+: 3
Schaub (based on this season projected numbers over 16 games)
Att: 586
Comp: 389
Comp rate: 66%
Yards: 4298
TD: 22
Int: 22
Sacks: 38
20+: 51
40+: 6
Schaub (based on last years projected numbers over 16 games, first year as a starter)
Att: 420
Comp: 279
Comp rate: 66%
Yards: 3260
TD: 13
Int: 13
Sacks: 23
20+: 33
40+: 9
Rosenfels isn't worth comparing given his few starts, that are spread out all over the place. But Carr, Schaub and Rosenfels have more game experience than Cassel. And Schaub started 11 games last season and his numbers weren't all world. And they all actually played in College, yet their numbers aren't that much better than Cassel's to this point. The Texans QB's are better at unloading the ball, but they also turn the ball over more, so pick your poison.
No, it just shows your completely ridiculous expectations out of a backup. No more no less. Fact: the guy is 4-2 and has had two bad games.