The 6-foot-7, 328-pound Henderson was released from the hospital a few hours later, but it wasn't immediately known when he would be back at practice. Trainer Mike Ryan said his outlook seemed good.

At the end of practice yesterday morning, Henderson went to the sideline and dropped to his knees. The team's No. 1 draft pick in 2002 was quickly surrounded by trainers, who laid him on the ground, stripped off his uniform and sponged him down with ice and cold water.

"This is not a good reflection of how well they're doing in teaching the players and getting them fluids," coach Jack Del Rio said. "We're taking the proper steps, and it's just unfortunate that we've had two guys struggle in the heat like they have."

Del Rio said the team will consider several options, including practicing at night under portable lights.

"Every little area or opportunity where we can improve ourselves, we're going to look into it," he said.

The temperature at practice yesterday was 82. With humidity factored in, it felt like 86.

Conditions were almost identical Sunday, when 310-pound defensive lineman Larry Smith collapsed on the field and was taken to the hospital. He rejoined the team yesterday but didn't practice outdoors.

"It's very disturbing to see a second player go down there," said Gene Upshaw, president of the players' union. "But I know Jack Del Rio. I know what type of camp he'd run and how he is about those issues. I have confidence in his ability to do what's right for the players."

On Monday, the widow of Vikings lineman Korey Stringer sued the NFL, accusing the league of fostering a "deadly culture" of abusive exercise that contributed to her husband's death. Stringer, a 335-pound Pro Bowl lineman, collapsed two years ago at the Vikings' training camp.

SIGNINGS

• Rams: Defensive tackle Jimmy Kennedy, a No. 1 pick out of Penn State, signed a five-year contract yesterday. Financial terms were not released.

• Ravens: Linebacker Terrell Suggs, a No. 1 pick out of Arizona State, signed a five-year contract yesterday. The deal will pay him $15.09 million if he qualifies for the $5 million escalator clause in the final year of the deal, and includes a $7.3 million signing bonus.

• Cardinals: Defensive end Calvin Pace, a No. 1 pick out of Wake Forest, signed a four-year, $8 million contract yesterday. The deal includes a two-tier signing bonus of $5 million that will be paid over two years.

EXTRA POINTS

• Chargers: Guard Toniu Fonoti, a Kahuku High grad and former Nebraska All-American, has has a strained right triceps and is expected to miss a few more days of training camp.

• Redskins: Defensive tackle Dan Wilkinson was released yesterday when he and the team couldn't agree on a deal to cut his team-high $3.5 million salary.