49ers coach Mike Singletary says that he will decide on the team's starting quarterback by the third game of the preseason. The team's third preseason game will be Aug. 29 against the Cowboys in their new Dallas stadium. San Francisco has Alex Smith and Shaun Hill as options. "I believe ... at the right time, one of those guys will be the guy that will take us where we need to go," Singletary said. "I feel very strongly that one of those guys is going to take us where we need to go. I have two quarterbacks I feel very confident about. I don't have one great guy. I have two good guys, and somebody is going to step up."