Don't be surprised if Porter goes to the practice squad. He had the inside track on the 3rd job until Kubiak decided to go with only 2 QBs on the roster.
BTW, I was one of those who wanted Bush. However, looking at the preseason Bush has had, I gotta agree with Kubes that he wouldn't fit in with the offense the Texans are now running. His one big run came on a cutback all the way across the field away from the design of the play. There's very little room for that in the zone blocking scheme. One cut and go is pretty much all that's allowed. That fits the Texans' RB styles (except for maybe Vernand Morency, but it looks like he's picked it up well). Mario, just going by the preseason, has opened up his linemates (especially Peek) and has led to several sacks and TFLs. All in all, I have learned to accept and live with the decision.
BTW Harley, Lundy was actually drafted by the Texans in the 6th round. Chris Taylor is the UFA the Texans kept.