Sidney Crosby acknowledged Friday that he recently had a setback and experienced symptoms during his recovery from a concussion, but said he isn't worried that he won't be ready for the start of next season, according to the ESPN.com report. Crosby addressed reporters for the first time in weeks, on the day the Penguins packed up and dispersed after being eliminated from the playoffs. He admitted the reason he hasn't been on the ice for drills or practices for the past two weeks was because he had experienced headaches and other symptoms.