The Panthers likely are on the lookout for an experienced backup quarterback now that Andy Dalton will be out for at least the next two weeks. Carolina coach Dave Canales confirmed Dalton’s injury after the quarterback missed the Panthers annual Fan Fest this past week. The coach said that Dalton strained a quad muscle. The injury is so new that Canales said it’s unclear how long the quarterback will miss. “Andy has a quad injury right now. We’re just trying to get him back,” the Panthers coach told reporters at Carolina training camp. “We’re not sure exactly,” on the timeline. “It’s a couple …