Rookie quarterback Troy Smith will make his first start Sunday when the Baltimore Ravens visit the Seattle Seahawks. With Kyle Boller missing his second consecutive day of practice because of lingering effects from a concussion, including headaches and sensitivity to light, Ravens' Coach Brian Billick confirmed Thursday Smith will take his place. "With Kyle, it would be problematic for him on Sunday, so, hopefully, he will be available to back up," Billick said. "Missing two days of practice would make it tough. We're certainly not going to put him at risk."