Clemons was helped off the field at Lehigh University about two
hours into the team's Tuesday morning practice. He was taken to
Lehigh Valley Hospital in an ambulance, but never lost
consciousness. He returned to Lehigh later Tuesday, the team said
on its Web site.
The National Weather Service station in nearby Allentown reported temperatures around 80 degrees.
Clemons signed a five-year contract with the Eagles in the
offseason, and is competing for a starting spot.