Coach Dick Jauron said Parrish was expected to be OK after he was sent as a precaution to a cooling tent located just off the team's practice field.

"I wouldn't say he did overheat, but we didn't want him to, and it was clearly gaining on him," Jauron said. He added the team took extra precautions because of Parrish's slim, 5-foot-9, 172-pound build, which hardly includes any body fat.

"Athletes like that, we've got to watch carefully," Jauron said. "So when he looked like he was starting to get to a point where he might have trouble, we decided to get him out and cool him down."

Parrish made his way to the tent on his own about 75 minutes into practice. Under the supervision of Bills trainers, Parrish spent about a half-hour soaking in a pool before being led to the locker room.

It was the hottest day of training since camp opened Thursday in suburban Rochester. There was no breeze and not a cloud in the sky to provide any comfort.

Jauron stopped practice midway through to give his players a 5-minute break to rest and drink fluids. He also ended the scheduled two-hour practice about 15 minutes early.

Reserve offensive lineman Brad Butler hurt his left hamstring during one-on-one drills and could miss practice time. Butler made his way off the field and was escorted immediately to the trainer's room and did not return.