FLOWERY BRANCH, Ga. (AP) -- Falcons cornerback Brent Grimes will have what coach Mike Smith says is "minor" surgery on his right knee Thursday and will miss at least two weeks.
Smith said Wednesday that Grimes has been playing with a sore knee since the Falcons' win over Detroit on Oct. 23. He left Sunday's victory over Minnesota in the first quarter.
The Falcons are thin at cornerback for this week's game at Houston. Smith says nickel back Kelvin Hayden is "probably very doubtful" after missing the Minnesota game with a toe injury.
Chris Owens or Dominique Franks will join Dunta Robinson as the starting quarterbacks. Darrin Walls likely will be active for the first time this season.
Smith says he hopes linebacker Stephen Nicholas (quadriceps) can return to practice late in the week.