Carolina Panthers WR Steve Smith did not practice today, a day after straining his left hamstring running a route during training camp. This is not good news for the Panthers and their offense as Smith was a huge part of it in 2005 when he had 103 receptions for 1,563 receiving yards, and 12 TDs.  After not having much of a supporting cast in the WR corp - Ricky Proehl and Kerry Colbert tied for second on the team in receptions with a very low 25 catches each - the Panthers signed Keyshawn Johnson during the offseason.  Hamstring injuries are tricky as they can feel fine in a day or hamper you for the next few months.  It remains to be seen how affected Smith’s left hammy is, but if Smith has to sit out camp, the team could have a serious problem on the offensive side.  You can’t replace a Steve Smith.