A tear-filled retirement announcement was just the latest instance of Jason and Travis Kelce, two of the toughest guys around, putting their emotions on full display.Jason Kelce, who has dark hair and a large dark beard, leans his head back and cries while sitting in front of a green wall covered in Philadelphia Eagles logos.

Scott Cacciola

As Jason Kelce strode to a dais on Monday to announce his retirement from the N.F.L. after 13 seasons with the Philadelphia Eagles, he appeared to be playing the role of traditional masculinity to perfection.

His face framed by his familiar Bunyan-esque beard, Mr. Kelce wore a cutoff T-shirt, sandals and a gold Rolex. Taking a seat behind a microphone, he thanked everyone for coming. And then he began to cry.

“Oh, man,” he said through tears. “This is going to be long.”

Sure enough, over the next 40 minutes, Mr. Kelce labored with his emotions as he choked out lines from his speech.

Mr. Kelce cried when he talked about his teammates. He cried when he thanked the Eagles’ owner. He cried when he reflected on the smell of “freshly mowed grass.” He even cried when he recalled instances of other people crying — namely, his father, who, according to Mr. Kelce, had “tears streaming down his face” when Mr. Kelce was drafted in 2011.

But it was only when Mr. Kelce spoke about his relationship with his younger brother, Travis, a tight end for the Kansas City Chiefs, that Jason seemed in danger of having a total meltdown. Travis, of course, was sobbing behind sunglasses in the front row. Someone tossed a towel to Jason so he could mop his face.

“This is where it’s going to go off the rails,” he said.

If not exactly taboo, crying in men’s sports was once considered a sign of weakness. Think Jimmy Dugan, the irascible manager from the film “A League of Their Own,” chastising a woman playing for him by bellowing, “There’s no crying in baseball!” Men like Dugan, both real and fictional, were always free to express anger, because anger was masculine. But tears? Those had no place on a ball field.

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A man with short hair and a beard lifts up black sunglasses to wipe tears away from his face.

Just like his older brother, Travis Kelce cried throughout Monday’s announcement.Credit…Tim Nwachukwu/Getty Images

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Jason Kelce. in a Hawaiian shirt and knit cap with the letters KC, hugs Travis, wearing a gray T-shirt over football shoulder pads.

The Kelces have made a point of publicly supporting each other in emotional moments, and those instances often lead to one or both of them crying.Credit…Rob Carr/Getty Images

While in many ways the Kelces could not be bigger jocks — Travis dates Taylor Swift, Jason chugs beer, and they both became famous playing a violent game — they do not hide their feelings. Professional athletes have cried before, of course. But the Kelces seem to cry more voluminously and with greater frequency than their predecessors.

Now that their platform extends to the Swift cosmos, the brothers’ public shows of emotion are notable. With their brand of vulnerability front and center, the message is clear: It is normal and healthy for men to cry.

“You can be a tough, strong guy, and you can also be emotional and connecting,” Dr. Fredric Rabinowitz, a professor of psychology at the University of Redlands, said in a telephone interview. “I think there’s a growing acceptance that our human emotions are natural, rather than something that we need to dam up or that we need to push down.”

Rich Eisen, the sports radio show host, seemed to speak on behalf of his peers when he described Mr. Kelce’s retirement announcement as “beautiful, just beautiful.”

The tears of male athletes were not always so uniformly celebrated. In 2009, Tim Tebow was a star quarterback at the University of Florida when he cried on the bench in the closing moments of a loss. In certain corners of the internet, Mr. Tebow was rebranded as “Tearbow.” It hardly seemed to matter that he had won the Heisman Trophy.

A man in a light-colored suit holds his hand up to his eyes as he cries while standing in front of an orange wall with a sign that says Basketball Hall of Fame.

When Michael Jordan was inducted in the Basketball Hall of Fame in 2009, he showed some rare emotion by breaking down into tears. Social media quickly began mocking him with the “Crying Jordan” meme.Credit…Andrew D. Bernstein/NBAE, via Getty Images

That same year, Michael Jordan was meme-fied as “Crying Jordan” when he broke down during his induction speech at basketball’s Hall of Fame. Granted, Mr. Jordan’s speech was also criticized for his attempts to settle old scores with people who had doubted him. But because he cried, a singular player was reduced to a punchline.

For the Kelce brothers, Monday’s news conference was no fluke.

Last year, after they played against each other in the Super Bowl, Jason Kelce found their mother for a tearful embrace. Travis Kelce later cried during his postgame news conference. And then the brothers cried together during a subsequent podcast.

“Ironically, you lose the Super Bowl, and you’re crying after the game,” Jason Kelce said through tears on an episode of “New Heights.” “And they’re not tears of sadness; they’re tears of joy.”

Emotional vulnerability had, over the last several years, endeared the Kelces to many in the N.F.L. community. But thanks to Travis Kelce’s relationship with Ms. Swift, the brothers have seen their reach transcend football, with them becoming unlikely role models for male behavior among legions of young women.

Some have taken even themselves by surprise with their embrace of Jason Kelce, a grizzled offensive linemen. “One random day Travis Kelce decided to make a friendship bracelet for Taylor Swift and now I’m sobbing over Jason Kelce’s retirement announcement,” said a young woman on TikTok, echoing the sentiment of many.

Dr. Rabinowitz, the author of “Deepening Group Psychotherapy with Men,” cautioned that work remains.

“Athletes get a pass because they have the masculinity chops,” Dr. Rabinowitz said. “But for the average guy, there is still, I think, this sense of shame around crying.”

Perhaps that is beginning to change. Dr. Rabinowitz recalled watching Jason Kelce’s retirement announcement on television.

“And I’m crying watching it,” he said.