Bill O'Brien's aggressive land grab became official last week, when Texans chairman and CEO Cal McNair announced that the head coach has been formally installed as the general manager, as well. O'Brien had been acting in that capacity since the firing of Brian Gaine last June, but the official decree puts the coach in a special class when it comes to organizational sway. It's essentially BOB's show now, and any success or failure will point directly back to him. He'll have to be creative as a roster builder this offseason: Quarterback Deshaun Watson and left tackle Laremy Tunsil will soon require new deals that could set the market at two marquee positions. That will gobble up cap space and could lead to salary-cap casualties and frugal spending on the free-agent market. The draft will present challenges, as well, after the Texans sent premium picks to Miami to land Tunsil last summer. Good luck, BOB