Late last year, former NFL wide receiver Demaryius Thomas was found dead at his home. The tragedy shook the league, most notably the Denver Broncos, with whom Thomas spent most of his 10-year career.It was only recently discovered that Thomas suffered from Stage 2 CTE. It's a progressive brain condition that's widely thought to be caused by repeated blows to the head and concussions.NFL fans reacted to this news, with one New England Patriots fan fearing for a currently active wide receiver.CJ Stroud QB1@BrandonHonaker1AB def has CTE if he does …. twitter.com/chrisnowinski1…Chris Nowinski, Ph.D.@ChrisNowinski1Breaking: Beloved #NFL WR Demaryius Thomas had Stage 2 #CTE when he died at 33. I arranged his brain donation to the VA-BU-@ConcussionLF Brain Bank where @annmckeemd @bu_cte made the diagnosis. He struggled with erratic behavior, memory loss, & paranoia. nytimes.com/2022/07/05/spo…71054Breaking: Beloved #NFL WR Demaryius Thomas had Stage 2 #CTE when he died at 33. I arranged his brain donation to the VA-BU-@ConcussionLF Brain Bank where @annmckeemd @bu_cte made the diagnosis. He struggled with erratic behavior, memory loss, & paranoia. nytimes.com/2022/07/05/spo…AB def has CTE if he does …. twitter.com/chrisnowinski1…Antonio Brown has been in the news several times over the past few seasons for erratic behavior, which is what Chris Nowinski said Thomas suffered from.Tampa Bay Buccaneers v New York JetsAn NFL fan believes that Brown can likely trace his brain problems back to one devastating hit from then-Cincinnati Bengals linebacker Vontez Burfict.Papi HATHAWAY 🇯🇲@HeadcACE1906@BrandonHonaker1 @A3ThePhirstDown burfict def destroyed his brain11@BrandonHonaker1 @A3ThePhirstDown burfict def destroyed his brainA Buffalo Bills fan thinks that Brown is in trouble.Max@masonbiznes@ChrisNowinski1 @AdamSchefter @ConcussionLF @annmckeemd @bu_cte Y’all wonder why Antonio Brown acts the way he does. Rest In Peace DT88🏽100@ChrisNowinski1 @AdamSchefter @ConcussionLF @annmckeemd @bu_cte Y’all wonder why Antonio Brown acts the way he does. Rest In Peace DT88🙏🏽A Cleveland Browns fan believes this diagnosis should be a wakeup call for the NFL.KalebSale@Kaleb_Sale@ChrisNowinski1 @AdamSchefter @ConcussionLF @annmckeemd @bu_cte We really need to start taking CTE more seriously1062@ChrisNowinski1 @AdamSchefter @ConcussionLF @annmckeemd @bu_cte We really need to start taking CTE more seriouslyOne NFL fan didn't mince words.The Captain@thecaptain1919@ChrisNowinski1 @AdamSchefter @ConcussionLF @annmckeemd @bu_cte It’s going to turn out that football is terrible for anyone to play.22@ChrisNowinski1 @AdamSchefter @ConcussionLF @annmckeemd @bu_cte It’s going to turn out that football is terrible for anyone to play.Another commenter noted that Thomas didn't have many head injuries reported over his career, which is frightening and sad.Tim Kendall@TimJKendall@ChrisNowinski1 @AdamSchefter @ConcussionLF @annmckeemd @bu_cte The scary part about this is DT didn’t have many head injuries18@ChrisNowinski1 @AdamSchefter @ConcussionLF @annmckeemd @bu_cte The scary part about this is DT didn’t have many head injuriesAnother fan thinks the reality is that football will never be safe.Dan@FFBuddyGuy@ChrisNowinski1 @ConcussionLF @annmckeemd @bu_cte This is so sad , TBI are horrible. It makes me incredibly sad that our football players end up with these type of issues, love the game but it's just so damn impossible to make safe. Hope his loved ones find some peace 2@ChrisNowinski1 @ConcussionLF @annmckeemd @bu_cte This is so sad , TBI are horrible. It makes me incredibly sad that our football players end up with these type of issues, love the game but it's just so damn impossible to make safe. Hope his loved ones find some peace 🙏Some fans are starting to see football's most prominent issue more clearly.Cage 🤷🏽‍♂️@RayCage@200withnobrakes @ChrisNowinski1 @AdamSchefter @ConcussionLF @annmckeemd @bu_cte Damn. Football probably not worth it@200withnobrakes @ChrisNowinski1 @AdamSchefter @ConcussionLF @annmckeemd @bu_cte Damn. Football probably not worth itOne in particular thinks football goes beyond other sports and can seriously harm players.Ricky Dojka@DojkaR@Nogamenolife143 @ChrisNowinski1 @MileHighReport @ConcussionLF @annmckeemd @bu_cte Football isn't a contact sport. Its a collision sport.3@Nogamenolife143 @ChrisNowinski1 @MileHighReport @ConcussionLF @annmckeemd @bu_cte Football isn't a contact sport. Its a collision sport.A Broncos fan just hopes Thomas' death isn't for nothing.Arizona DieharD Hard Club@AzDieHarDClub@ChrisNowinski1 @ConcussionLF @annmckeemd @bu_cte RIP DT . He's a guy who will never be forgotten, I hope this research helps current nfl players. 🧡@ChrisNowinski1 @ConcussionLF @annmckeemd @bu_cte RIP DT . He's a guy who will never be forgotten, I hope this research helps current nfl players. 💔😢🧡💙NFL star Demaryius Thomas' diagnosisAccording to Ken Belson of the New York Times:"Those closest to [Thomas] said his behavior became increasingly erratic in the last year of his life, which was marked by the memory loss, paranoia and isolation that are hallmarks of chronic traumatic encephalopathy, the degenerative brain disease linked to repeated head hits."They went on to say that although he was posthumously diagnosed with Stage 2 CTE, his life was also complicated by seizures from a car crash in 2019.Because of this, his death cannot be solely linked to CTE, though it is clear that the brain condition did not help extend his life.CTE has plagued many football players during and after their careers, causing some to die. Junior Seau, Andre Waters and Dave Duerson all committed suicide and were diagnosed with CTE.Jovan Belcher, who was just 25, killed his girlfriend and himself and was diagnosed with the disease. Aaron Hernandez also had CTE.Philip Adams recently murdered six people, including his wife and two grandchildren. Vincent Jackson was also diagnosed with a mild case after his death.