The heat turned up at Panthers' training camp Monday, and so did the intensity -- at least for the first half of practice.
Panthers coach Ron Rivera talked to his players for about five minutes after the 2-hour morning session wrapped up, reminding them to finish practice with the same effort level.
After mostly unseasonably cool temperatures for the first two weeks of camp, Monday was a hot, humid day in Spartanburg. Rivera said the conditions may have sapped his team's energy.
"I know it was tough. I know it started getting hot and muggy. You could feel the humidity," Rivera said. "But you've got to fight it because that's probably what we're going to face when we go to Tampa Bay."
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Right tackle Nate Chandler returned and had a good practice after missing Sunday's practice with a knee injury.
During team drills at the end of practice, veteran Garry Williams replaced Byron Bell at left tackle. Rivera didn't know why the move was made, but said Bell had a minor knee issue flare up earlier at practice.
Two members of the defensive end rotation were out -- rookie Kony Ealy (left foot) and Mario Addison (stomach bug). Backup OL Derek Dennis also sat out with flulike symptoms.
Backup RB Darrin Reaves left early with a knee injury.