Now anyone that reads this site with much regularity (if such people exist) know that I've been in Rex's corner on most of the discussions about his career. Many times I waffled between Rex and Kyle, mostly because I felt the best thing for the team would be for Rex to return the investment made on him. However, last year in relief of Kyle he was just plain horrible. I realize that he was rusty, and I realize he faced a tough defense against Tennessee, but a good back up quarterback would be a person who can relieve and perform adequately with minimal practice repititions, but Rex was just a pathetic 32 of 62 (51.6%), for 257 yards, a Jonathan Quinn like 4.1 yards per attempt, 2 tds, 2 ints, and an ugly 59.7 rating last year. That's...not good.
On the other hand, Rex did perform fairly well off the bench in a game in the Oakland game in 2007 and the Falcons game in 2005, going 16 of 30 (53.3%) for 235 yards, 1 tds, 1 int, a pretty good 7.8 ypa, with a 76.3 rating, and the Bears did win Both games (as well as the Detroit game this year making the Bears 4-1 in games in which Rex has relieved the starter). So that sort of clouds the picture. Is Rex a good option as your back up quarterback?
Well, I think that with the situation he's in, Rex is good for the Texans. I'm not high on Dan Orlovsky and never really have been. Rex has a legitimate shot of winning the back up job and that means backing up a fairly brittle player in Matt Schaub. Since Schaub has missed 10 starts over the last two years, its possible that Rex's job as a back up would actually entail multiple starts and enough practice reps to get him into the swing of things. In which case the very talented Houston offense should render him a starting caliber quarterback for as long as Schaub is out. Certainly Grossman to Andre Johnson is a potent throwgasm waiting to happen. So if you're looking for a guy to come in and save the team in the fourth quarter of a close game, I'd look elsewhere. But if you've got the time to let him take the wheels for a few games, then you could do a lot worse than Rex.