Calais Campbell has played over 10,000 snaps of football across his 15 NFL seasons. At the University of Miami, he played 36 games over three seasons. Before that, he had a long, decorated high school career. But the Ravens defensive lineman had never seen someone fall in a game the way Damar Hamlin did Monday night.

The Buffalo Bills safety took a hard hit to his upper body on his tackle of Bengals wide receiver Tee Higgins in the first quarter, stood up and then collapsed to the ground inside Cincinnati’s Paycor Stadium, his body limp. He suffered cardiac arrest. CPR was administered to Hamlin, 24, on the field for several minutes, and he received oxygen as he was placed in an ambulance, according to ESPN’s telecast, and was taken to a local hospital.

“The way he fell down, I was like, ‘That looks different. That looks a little more serious,’” Campbell said.

Even as Hamlin shows what the Bills on Wednesday called “signs of improvement,” he remains hospitalized in critical condition. Ravens coach John Harbaugh, addressing maybe the team’s biggest media contingent in months, opened his news conference Wednesday by expressing sympathy for Hamlin and his family.

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“It takes a lot of courage to do a lot of things in life, and it’s good to remember that,” Harbaugh said. “If there’s some good that comes from these types of circumstances, it’s that we all have an opportunity to see the humanity in these kinds of endeavors, whether it’s football, which, in this case, it is. I told the guys, ‘It takes a lot of courage to play football.’”

In Baltimore and across the league, Hamlin’s hospitalization prompted another reckoning with the sport’s inherent dangers. But the Ravens standouts who spoke after practice Wednesday were unanimous in their desire to carry on, business as usual, even after an incident that had highlighted how grim football’s risk-reward proposition could be.

“At the end of the day, most of us have been playing football for a long, long time,” tight end Mark Andrews said. “So we just go out there playing the game that we love. If I didn’t love this game, maybe it’d be a little bit more difficult, but I love what I do. I love each and every day coming into this facility, playing for the Ravens and competing my heart out.”

Hamlin’s tackle stuck with cornerback Marlon Humphrey, not only because of what came after the play, but because of what happened on it. “It just looks so ordinary,” he said.

Humphrey, who’s under contract in Baltimore through 2026, recalled having conversations with an unnamed friend in the NFL who often reminds him of his own day-to-day job security: “I’m on a one-day contract.” Humphrey said he’d been thinking about the randomness of life in recent days. Coverage of Hamlin’s status had been unavoidable, stretching even into the team cafeteria.

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“Obviously, you say all the time, ‘You put your life on the line playing this game,’ but it’s crazy for that to really end up like that,” he said.

Monday’s incident underscored the precariousness of the sport for those most at risk. Hamlin, a sixth-round draft pick in 2021, has made less than $2 million in his professional career. Even if he fully recovers, he might never play again. NFL executive vice president of football operations Troy Vincent told reporters Wednesday that Hamlin would be provided the resources and benefits guaranteed to vested veterans, despite having played for only half as long as necessary.

But most players forced to give up their NFL dreams because of injuries do so without having qualified for the league’s health care or pension program.

“It puts it into perspective for you,” said safety Chuck Clark, a former sixth-round pick like Hamlin. “Whenever you go out on the field, anything can happen. You always want to be taken care of and know that you can take care of your people if you’re not able to. ... You’re always thinking about that.”

Campbell, a member of the NFL Players Association’s executive committee, said the union, as part of its work with league officials, tries to make sure the game “is played in the safest environment for us.” But he acknowledged that “the risks that you take are very, very high.” He said he wouldn’t fault anyone for considering retirement.

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“You have to know the risks,” Campbell said. “You have to choose to go out here and play the game. If you make that choice, you have to go out here and give it your all and make sure that you do everything possible to give yourself the best opportunity to come out on the other side and be healthy and be able to have a normal life after you retire.

“But I do think, for players around the league, I’m sure, naturally, so many guys have questioned, ‘Do I want to play football again?’ after seeing something like that. Do you want to take that risk? But I do know a lot of guys love this game enough, and I know a lot of guys are going to continue to play football.”

The Ravens have made counseling available, as they do throughout the season, and players and coaches discussed Hamlin in team and positional meetings. Humphrey said teammates acknowledged the “tragic” nature of his hospitalization, then went on getting ready for Sunday’s regular-season finale against the Cincinnati Bengals.

They still love the game. That meant preparing like they love it, playing like they love it.

“It doesn’t really change my approach of how I go about the game,” Humphrey said. “It just makes you really just think about what you’re doing. … If you were playing and going all-out, you got hurt, or you’re playing kind of soft, and you get hurt, which one would you rather go out?

“He did make that play — that’s the thing — and I know hopefully, he makes it through, but I think there’s something there. If you’re going to play this game, you just go all-out and what happens, happens. But you never want to tiptoe out there on the grass.”