Tom Brady has filed his retirement letter with the NFL and National Football League Players Association (NFLPA), effectively rubber-stamping the end of his professional career, according to reports.

The veteran quarterback originally announced his retirement last year following two seasons with the Tampa Bay Buccaneers, before walking back on his decision.

Following Tampa Bay's defeat in the Wild Card round to the Dallas Cowboys last month, however, the 45-year-old announced he was to quit for good.

On Friday, ESPN's Adam Schefter reported that Brady has written to the league and the NFLPA to formally confirm his decision to retire.

The move makes the seven-time Super Bowl winner eligible for the Class of 2028 in the Pro Football Hall of Fame, to which he is likely to be an immediate inductee.

Across a two-decade-plus tenure following his selection by the New England Patriots, Brady became one of the NFL's undisputed greats.

During his time in New England he won six Super Bowls, before adding a seventh ring to his collection during his spell in Florida with the Buccaneers.

Brady is set to take up a role as a broadcaster with Fox Sports for their NFL coverage following his retirement, though he will not start in the role until 2024.

He is due to instead take a year out from the sport, missing the 2023 season in all capacities, before he joins the commentary booth the following year.

J.J. Watt, the former Houston Texans and Arizona Cardinals defensive end who announced his retirement in December, quoted tweeted Schefter's report with the caption: "I was unaware there was paperwork... Definitely not gonna [sic] fill that out, but definitely retired."

J.J. Watt says there is "no question" that Tom Brady is the "greatest of all time".

Brady retired for a second time on Wednesday at the age of 45.

A year on from announcing a retirement that lasted only 40 days, Brady said he has now called time on his playing days "for good".

Watt, a three-time NFL Defensive Player of the Year, announced his own retirement in December, having spent two seasons at the Arizona Cardinals and 10 years with the Houston Texans.

And he welcomed seven-time Super Bowl champion Brady to the "newly retired group".

"Greatest of All Time. No question, no debate," Watt tweeted.

"It's been an honour and a privilege.

"PS – The newly retired group meets on the golf course every morning at 10am. Drinks are on the new guy, so bring your wallet."

J.J. Watt feels he could not have had a better farewell from the NFL after his final game for the Arizona Cardinals.

The defensive end registered two sacks in his final career appearance, a 38-13 loss to the San Francisco 49ers, receiving a standing ovation when he was removed from the action in the final two minutes of the game.

An official stood between the 49ers center and quarterback Josh Johnson, holding off play to allow Watt to have his moment, which continued the tributes for the 33-year-old.

In a team meeting on Saturday, Arizona defensive line coach Matt Burke played a six-minute video tribute to the three-time Defensive Player of the Year – which included messages from his family, alongside the likes of Peyton Manning, Tom Brady and Aaron Rodgers.

J.J's youngest brother, T.J., was the first to appear in the video and sparked tears, before both he and Derek Watt made significant contributions in the Pittsburgh Steelers' season-ending win over the Cleveland Browns.

"I absolutely lost it. I was bawling like a baby, and I didn't stop until long into the night," he told reporters.

"I mean, the highlight videos are great, all the plays are cool, but when you hear from the people in your life that are important, from my family, from my friends, and then you hear from people you have the utmost respect for, team-mates, coaches, opponents, it hit me in a different way that I never expected.

"There's no way to explain what it feels like to anybody because the love that I have for them, the pride that I have for them.

"How much fun I have watching them, and then they walk in wearing my jerseys and T.J. gets whatever he had [a half-sack], Derek scores a touchdown.

"I mean, I wanted to win today, but for our family, I couldn't ask for a better send-off.

"I want to thank the 49ers, that was very classy, and their fans, they didn't have to do that. I appreciate them doing that, that was better than I could have expected certainly from that standpoint.

"[I] had my wife and son here and my parents here, I'm thankful and grateful, and I'll always remember it that's for sure."

J.J. Watt is still going out at the top of the game even if it is "bittersweet" that he will end his NFL career without a Super Bowl title.

That is the view of Carolina Panthers defensive end Yetur Gross-Matos, who believes Watt has been a long-time inspiration to many younger players.

Arizona Cardinals pass-rusher Watt announced his impending NFL retirement on Monday.

He posted on Twitter that Sunday's loss to the Tampa Bay Buccaneers was the first NFL game his son attended but also his final home game before retiring after the 2022 season.

Already eliminated from the playoffs, the Cardinals play their final two games on the road – at the Atlanta Falcons this week and at the San Francisco 49ers in Week 18.

"If it is the end, it is kind of bittersweet," Gross-Matos said to Stats Perform about Watt, whose 2021 move to Arizona did not produce the long postseason run he craved.

"For someone who has done so much for the sport, you kind of want them to go out with the championship, especially for all he has done. 

"But he has still had a great career. He is still getting double-digit sacks and he was able to get three in a game [against the Denver Broncos in Week 15].

"So I mean, he's still going out on top and I am hoping for the best for him.

"He did right by the shield and set a great example for a lot of great defenders coming after him

"He was definitely a huge inspiration for me, someone I looked up to a lot. He is someone I've watched over the years and continue to watch to this day.

"And, when I was in college he definitely convinced me to get in the weight room when he was throwing guys around [in the NFL]."

One of the NFL's most feared pass-rushers early in his career, Watt battled through some major injuries in the past few seasons and also revealed in October he was playing through a case of atrial fibrillation.

A first-round pick by the Houston Texans in 2011, the 33-year-old is a three-time Defensive Player of the Year, a five-time first-team All-Pro and five-time Pro Bowl selection.

The future Hall of Famer led the league in sacks in 2012 and 2015, and his 111.5 career sacks rank fourth among active players. His 9.5 sacks this season are his most since recording 16 in 2018.

"Koa's first ever NFL game," Watt wrote in his announcement. "My last ever NFL home game.

"My heart is filled with nothing but love and gratitude. It's been an absolute honour and a pleasure."

Arizona Cardinals star defensive end JJ Watt has announced his football career is ending.

Watt posted to Twitter on Monday that Sunday's loss to the Tampa Bay Buccaneers was the first NFL game his son attended but also his final NFL home game.

"Koa's first ever NFL game," Watt wrote. "My last ever NFL home game."

Already eliminated from the playoffs, the Cardinals play their final two games on the road – at the Atlanta Falcons this Sunday and at the San Francisco 49ers in Week 18.

"My heart is filled with nothing but love and gratitude," Watt wrote. "It's been an absolute honour and a pleasure."

One of the NFL's most feared pass-rushers early in his career, the 33-year-old Watt battled through injuries in the past few seasons and revealed in October he was playing through a case of atrial fibrillation.

A first-round pick by the Houston Texans in 2011, Watt is a three-time Defensive Player of the Year, a five-time first-team All-Pro and five-time Pro Bowl selection.

The future Hall of Famer led the league in sacks in 2012 and 2015, and his 111.5 career sacks rank fourth among active players. His 9.5 sacks this season are his most since recording 16 in 2018.

Arizona Cardinals defensive linesman J.J. Watt said he would play against the Carolina Panthers on Sunday after undergoing a heart procedure.

Watt spoke out ahead of his team's game to reveal he had to have his heart shocked back into rhythm after lapsing into atrial fibrillation on Wednesday.

The former Houston Texans man said he was disclosing the news because the information had been leaked.

"I was just told somebody leaked some personal information about me and it’s going to be reported on today," Watt wrote on Twitter.

"I went into A-Fib on Wednesday, had my heart shocked back into rhythm on Thursday and I'm playing today. That's it."

A three-time NFL Defensive Player of the Year during his time in Texas, Watt is in his second season with the Cardinals.

Arizona Cardinals cornerback Jeff Gladney has died after being involved in a car accident in the early hours of Monday morning.

The Dallas County Sheriff's Office announced that at 2:28am, first-responders attended a scene where two cars collided.

One other person died in the crash. The second victim has not been identified as the incident remains under investigation.

The Cardinals confirmed Gladney's death in a brief statement.

"We are devastated to learn of Jeff Gladney's passing. Our hearts go out to his family, friends and all who are mourning this tremendous loss," the statement read.

Gladney, 25, was a first-round pick in the 2020 NFL Draft by the Minnesota Vikings after a glittering college career at TCU, where he became close friends with Philadelphia Eagles wide receiver Jalen Reagor.

Responding to the news, Reagor tweeted out: "Lost my brother, my best friend, my right hand man… ain't too much more I can take man damn! R.I.P Jeff Gladney, brother watch over me please."

J.J. Watt was one of several of Gladney's Cardinals teammates to also pay their respects, saying: "Horrifying news to hear this morning. Just tragic. Rest in peace Jeff."

Gladney's former team, the Vikings, also offered their condolences.

"We are saddened by the tragic death of former Viking Jeff Gladney," the franchise said. "Our hearts go out to his family and friends, as well as the Arizona Cardinals organisation and Jeff’s current and former teammates and coaches who are mourning his life lost much too soon."

J.J. Watt reflected on the Arizona Cardinals' 34-11 playoff defeat to the Los Angeles Rams as "a massive failure".

The Cardinals ended their season with a whimper at SoFi Stadium on Monday as the Rams dominated the Wild Card round clash between the NFC West rivals.

Rams quarterback Matthew Stafford ended his wait for a first playoff win, throwing touchdown passes for Odell Beckham Jr. and Cooper Kupp while running in another.

Los Angeles will face defending champions the Tampa Bay Buccaneers in Florida next Sunday in the divisional round. 

The Cardinals, on the other hand, are left to lick their wounds following a fifth defeat in seven games that brought their campaign to a juddering halt.

Watt returned from a shoulder injury to face the Rams and the defensive end pulled no punches with his verdict on the Cardinals' performance.

He said: "It was a massive failure from what we were capable of doing and from what we showed we can do [up until the game Monday], there's no other way to describe it than as a failure.

Quarterback Kyler Murray endured a game to forget, passing for 137 yards and throwing two interceptions in the Cardinals' first playoff game since 2015.

He said: "I play to win the Super Bowl. That's the goal, that's the mission, is to win the Super Bowl not to make the playoffs or go to the second round. We fell short."

He added: "It's disappointing that we didn't make it a game and come out and play the football we know we're capable of playing, that's really the most disappointing part.

"Losing is one thing, but when you don't even make it competitive, it's another thing.

"I put a lot on my shoulders, put a lot on myself and to dream of this moment and then be in the playoffs, the first game of the playoffs and then to play the way I did, to play the way we did, it's, like I said, disappointing."

Cardinals head coach Kliff Kingsbury: "When you're dropping back against that that group, it's not a good recipe.

"And that's what we've found ourselves in. So, we just made it a tough night."

The Arizona Cardinals have activated J.J. Watt from injured reserve in time for him to make an unexpected return for their Wild Card round clash with the Los Angeles Rams.

Watt was placed on injured reserve in November having undergone what was thought to be season-ending shoulder surgery in October.

However, the three-time Defensive Player of the Year has expedited his recovery and will line up for the Cardinals on Monday as they look to upset their NFC West rivals at SoFi Stadium.

Despite playing only seven games, Watt ended the regular season with the third-most quarterback pressures among Cardinals defenders with 32.

The Cardinals are looking to claim their first playoff win since the 2015 campaign when they lost the NFC Championship Game to the Carolina Panthers.