49ers' Coach Mike Singletary claims that tight end Vernon Davis isn't among the team's "cancers". "Every team has them, but it's how you deal with them," Singletary said. "It's how mature your team is, if you're able to deal with those guys. It's how your leaders on that team respond to them." "Sometimes it's not a big deal. You just shut them down." However, Davis, who was sent to the locker room midway through the fourth quarter on Sunday, isn't considered to be one of the team's problems. "Vernon is not a problem guy," Singletary said. "Vernon just forgets sometimes that the team is more important."