The San Francisco 49ers, already beset by injuries in training camp, don't seem too concerned that superstar running back Christian McCaffrey missing the past two practices with what has been described as "tightness." "No," head coach Kyle Shanahan told reporters when asked if the absences were worrying. Offensive coordinator Klay Kubiak, meanwhile, told reporters that McCaffrey's absence from Monday's practice was down to the team "just managing" his workload. "Christian always kind of has his rep count in any camp," he continued. And, he's a veteran player, so you have to monitor him and get him ready for the first week."