While all eyes will be on Williams on defense, the pressure on offense will fall squarely on the shoulders of last year's most-sacked man, David Carr. A former No. 1 pick himself, Carr has yet to live up to lofty expectations.
He had his best season in 2004, with 3,531 yards passing with 16 touchdowns, but regressed last season and often looked shell-shocked.
Yet the Texans expressed their faith in him by exercising an $8 million contract option that will keep him in Houston for three more seasons. The decision likely had a lot to do with Kubiak, a former quarterback who liked Carr from the start.
"He has all the physical tools that it takes to be successful in this league," Kubiak said. "Does David have to play better than he played last year? Of course he does. We all have to. But we expect a lot of him, and we're going to try to build this football team around him and help him be successful."
Kubiak, who backed up John Elway in Denver and later coached him, said quarterbacks often "play their best football from year 5 to 11 or 12" - exactly the phase of his career Carr is entering.
"I'm hoping his best is in front of him, and the sooner the better," Kubiak said.
Carr has already at work learning Kubiak's new offense, and top receiver Andre Johnson will be joined by Eric Moulds, who was traded from Buffalo.
After struggling through his worst season in 2005, Johnson has been rejuvenated by the mere presence of Moulds. He is giddy over having a mentor as well as another receiving threat, and hopes are high that their chemistry will translate to on-field success.
Of course the key to all this will be Houston's ability to assemble an effective offensive line.
It's unclear what combination of players the Texans will line up to protect Carr, but the unit will be anchored by veteran Steve McKinney at left guard. They added tackle Ephraim Salaam in free agency and gargantuan tackles Eric Winston of Miami and Charles Spencer from Pittsburgh in the third round of the draft. Winston is 6-7, 307, and Spencer is 6-5, 352.
The group could get a boost from the hiring of Mike Sherman, a longtime offensive line coach who was fired as Green Bay's head coach after last season. Sherman will be Kubiak's assistant head coach for offense.
"I think we'll be very good up front," Kubiak said. "The question is: Which five guys is it going to be? Our competition in that position at training camp will probably be about as fierce as any position that we have."