Last year, the Oakland Raiders papered over their defense by handing out one-year contracts to veteran misfits. This year, they have raised the stakes, signing better players to two-year deals.
Follow all the developments on the NFL's open market with our up-to-the-minute tracking of 2014's free agents. More...
Smith, 32, has been a durable, scheme-versatile pass rusher, recording 27 sacks in five years with the Texans.
A 42-game starter over the past three seasons, Brown likely will line up opposite 2013 first-round draft pick D.J. Hayden in Oakland.
After collecting four veteran defensive starters over the past two days, Reggie McKenzie still has more money left to spend than any other general manager.