Cardinals quarterback Matt Leinart fractured his left collarbone while getting sacked late in the first half of Sunday's 34-31 victory over the Rams. Coach Ken Whisenhunt said Leinart, the team's first-round pick in 2006, would be out indefinitely. "We don't know how long it's going to be," Whisenhunt said. "But it's going to be for an extended period of time."