Wide receiver Torrey Smith, who sprained his right ankle in the preseason opener last Thursday, returned to practice on a limited basis after missing Saturday's workout. He called the injury a "little nick" and said that "you have to learn to play with it." … Center Matt Birk, who has practiced the past two days after being sidelined with back spasms, expects to start Friday night against the Detroit Lions. … Tackle Jah Reid, who has yet to participate in training camp because of a strained calf, did some individual work and acknowledged that he is getting closer to returning, but did not give a timeline. … Free safety Ed Reed, who was initially ruled out by the team before Thursday's game, said he decided to play a series because a couple of teammates asked him to play before kickoff. "I was like, 'Cool,'" Reed said. "I'm not doing anything else." … Reserve inside linebacker Brendon Ayanbadejo left practice early because of a knee injury, but he doesn't believe it to be serious.