Here's a list of healthy athletes having problems, I've just compiled from different places, I take no credit. This belongs to other anons out there. Please post any other higher profile athlete stories you find.
List of Athlete Collapses/Deaths
Study Deleted. Not relevant.
•Former world No. 25 Jeremy Chardy says he has a "series of problems" after taking the COVID-19 vaccine and his 2021 season is over. This summer, 34-year-old Chardy decided to get vaccinated and it didn't work out well for him. Chardy, now ranked at No. 73 in the world, claims he is unable to train and play. "Since I got my vaccine [between the Olympics and the US Open], I have a problem, I have a series of problems. As a result, I can't train, I can't play. Continued https://www.tennisworldusa.org/tennis/news/Tennis_Interviews/102836/jeremy-chardy-i-regret-getting-vaccinated-i-have-series-of-problems-now/
•23 year old Roy Butler, “healthy and fit”, passed away ohttps://twitter.com/newsforallire/status/1428301909715296263
•Christian Eriksen (heart attack, survived) https://archive.fo/tHh2T#selection-847.29-847.46
•Roy Butler (massive brain bleed, died) ohttps://davidicke.com/2021/08/19/irish-footballer-roy-butler-dies-at-23-of-massive-brain-bleed-three-days-after-getting-fake-covid-vaccine-media-stay-silent-on-the-obvious-connection/
•Fabrice N’Sakala (collapsed on pitch, hospital recovery) https://archive.fo/PVbVT#selection-835.0-835.16
•Dylan Rich (cardiac arrest, died) https://archive.fo/wip/DxJBc
•Dave Hyde (collapsed post-match, died) https://archive.fo/wip/bXyX5
•Alex Evans (cardiac arrest, died) https://archive.fo/3jxOb
•Maqsood Anwar (heart attack, died) https://archive.fo/wip/6SJIf
•TWO West Indies Women's Cricketers Collapse in 10 mins: https://archive.fo/mUeEL
•Samuel Kalu, brief collapse on pitch: ohttps://www.skysports.com/football/news/11808/12382718/samuel-kalu-bordeaux-striker-collapses-during-ligue-1-match-against-marseille-before-briefly-returning-to-the-pitch
•Simon Greenberg, sports journalist turned PR guy •https://www.prweek.com/article/1726333/obituary-simon-greenberg-%E2%80%93-warm-entertaining-sharp-mind
•Kenyan Athlete Gilbert Kwemoi •https://www.kenyans.co.ke/news/67479-kenyan-athlete-gilbert-kwemoi-who-won-gold-medal-china-collapses-dies
•Mary Hanley, Irish Athlete (looks older) •https://www.irishmirror.ie/news/irish-news/tributes-pour-one-kind-meath-24897515
•27 year old professional Japanese baseball player, pitcher, 2016 #1 draft pick for Chunichi Dragons, name Kinoshita. Article only in Japanese. Collapsed during practice after injection. Was in coma a week. Then died.
•33yo New York Jets defensive end Vinny Curry, has likely seen his career go bye-bye because after getting the vaccine, he developed life-threatening blood clots ohttps://patriotdailypress.org/2021/09/02/nfl-career-may-be-over-for-young-defensive-end-who-developed-blood-clots-after-being-pressured-into-taking-covid-19-vax/
•Christian Eriksen Collapses at Euros due to heart issue https://youtu.be/s0B03LSzXvo
•Two West Indies Players – Chinelle Henry, Chedean Nation Collapse on Field: https://www.india.com/sports/cricket-two-west-indies-players-chinelle-henry-chedean-nation-collapse-on-field-during-2nd-t20i-against-pakistan-women-watch-video-4785827/
•Atletico Madrid striker collapses in training and requires medical attention https://www.youtube.com/watch?v=-R2_5LMobXc
•Brazilian soccer player Alex Apolinario dies after collapsing on pitch during match in Portugal https://www.cbssports.com/soccer/news/brazilian-soccer-player-alex-apolinario-dies-after-collapsing-on-pitch-during-match-in-portugal/
•Britain's Jack Draper collapses at Miami Open https://www.youtube.com/watch?v=VDuOP0V1nUw
•Indonesian doubles star Kido dies of heart attack at 36 https://www.youtube.com/watch?v=blqVQ9oNr_g
•Ghanaian referee collapses during AFCON Match https://www.youtube.com/watch?v=cvPQO44NzN4
•Referee Bert Smith collapses on court, taken off on stretcher during first half of Gonzaga-USC men's Elite Eight game https://www.youtube.com/watch?v=PHG8bRhvJ88
•Josh Downie: Cricketer, 24, dies after heart attack at practice https://www.bbc.co.uk/news/uk-england-nottinghamshire-57058626
•Ex-Parma footballer Giuseppe Perrino dies aged 29 at brother’s memorial match after collapsing while playing https://www.thesun.co.uk/sport/football/15151824/giuseppe-perrino-dead-29-parma-brother/
•Raymond van Barneveld collapses and receives paramedic attention during PDC Players Championship https://www.dailystar.co.uk/sport/darts/pdc-players-championship-8-suspended-23759939
•Volleyball player collapses during game, dies https://www.thehindu.com/news/cities/Mangalore/volleyball-player-collapses-during-game-dies/article34185430.ece
•The Frenchman, 20, suddenly fell unconscious in worrying and distressing scenes, he had a tachycardia attack, an abnormal electrical impulse in his heart, causing him to lose consciousness. https://www.thesun.co.uk/sport/football/13901939/goalkeepers-rushed-hospital-collapsing/
•Ethan Jovani Trejo, a 16-year-old soccer player, collapsed on the field during conditioning https://eu.cincinnati.com/story/news/2021/06/25/teen-dies-after-medical-incident-princeton-high-school-field/5344293001/
•Samuel Kalu, 24, collapses minutes into football game: https://www.bbc.com/sport/football/58228778
•Roy Butler, 23, Irish footballer Watford FC dies after Jansen: https://twitter.com/NewsForAllIre/status/1428301909715296263?s=20
•FA Youth Cup - player suffered sudden cardiac arrest on the field : https://www.mirror.co.uk/sport/football/news/breaking-fa-youth-cup-match-24898627
•Vinny Curry, 33, out for season due to blood clots: https://nypost.com/2021/08/25/jets-vinny-curry-out-after-rare-blood-disorder-diagnosis/
•Australian sailor Cameron Dale, 29, dies after catastrophic stroke: https://7news.com.au/sport/sailing/australian-sailor-jessica-watson-reveals-sudden-death-of-partner-cameron-dale-c-3845979
•Two young Columbia High school footballers die: https://www.wistv.com/2021/09/04/he-would-love-it-donadrian-robinsons-family-reacts-tribute-wj-keenan-high-school/?outputType=apps
•Bollywood’s star, 40, dies following heart attack https://www.dailymail.co.uk/news/article-9950385/Indian-TV-film-star-Siddharth-Shukla-40-dies-heart-attack.html#reader-comments
•Tom Felton, 34, collapses during golf game: https://bbc.in/3i4YpI5?fbclid=IwAR0aZBaXpiX9ky34g3eLiG3pcMs5r2udih4kRGUIi7GOBK3iciefX1-qoXk
•Francis Perron, 25, dies after football game - https://www.cbc.ca/news/canada/ottawa/usports-ottawa-gee-gees-francis-perron-dies-1.6182332
•Parys Haralson, 37, former Saints line backer dies https://www.usatoday.com/story/sports/nfl/2021/09/13/parys-haralson-former-49-ers-and-saints-lb-dies-37/8328669002/
•Jimmy Hayes, 31, former Bruins player unexpectedly dies: https://www.bostonglobe.com/2021/08/23/sports/jimmy-hayes-former-bruin-boston-college-hockey-champ-dies-31/
•Kjeld Nuis, 31, Dutch professional skater admitted to hospital with inflamed heart: https://www.rtlboulevard.nl/entertainment/news/artikel/5243606/kjeld-nuis-vaccinatie-ziek-update
•John Stokes, 21, athlete at Tennessee Uni hospitalized with heart inflammation: https://www.yahoo.com/lifestyle/student-athlete-john-stokes-myocarditis-covid-vaccine-002451374.html?guccounter=1
•Jake Ehlinger, 20, found dead - cause unknown: https://usdaynews.com/celebrities/celebrity-death/sam-ehlinger-brother-death-cause/
•Jeremy Chardy, 34, tennis pro cannot train or play after vaccine: https://www.tennisworldusa.org/tennis/news/Tennis_Interviews/102836/jeremy-chardy-i-regret-getting-vaccinated-i-have-series-of-problems-now/
•Francesca Marcon, 38, volleybal professional can’t play, has pericarditis post vaccine: https://www.lapressa.it/notiziario/sport/la-campionessa-di-volley-ho-una-pericardite-post-vaccino
•Yusuke Kinoshita, 27, baseball pro dies 7 weeks post vaccine: https://thecovidworld.com/yusuke-kinoshita-27-year-old-japanese-professional-baseball-player-dies-7-weeks-after-covid-19-vaccine/
•Alex Stalock, 34, out for the season due to heart condition: o https://ca.sports.yahoo.com/news/nhl-oilers-goalie-alex-stalock-miss-entire-season-with-heart-condition-covid-19-related-191817673.html
•Not a 'young athlete' but Bob Odenkirk got into the best shape of his life to film an action movie, then collapsed randomly afterwards with a heart condition. https://www.nbcnews.com/pop-culture/pop-culture-news/bob-odenkirk-recovering-heart-related-issue-after-collapse-better-call-n1275347
•Also John Stokes, the guy who went on TikTok and got his life ruined. https://www.msn.com/en-us/health/medical/a-student-athlete-e2-80-99s-tiktok-went-viral-after-he-developed-myocarditis-from-the-vaccine-here-e2-80-99s-what-experts-want-you-to-know/ar-AAOIFvF?ocid=uxbndlbing
•Former Atlanta Hawks guard Brandon Goodwin, 26, out for the season after getting blood clots from the COVID19 vaccine. https://www.peachtreehoops.com/2021/10/3/22706769/former-atlanta-hawks-guard-brandon-goodwin-claims-covid-19-vaccine-ended-his-season
•Cameron Burrell, 26, dead: US sprint star dies in unexplained incident: https://archive.fo/oYXQN
•NZ Olympic cyclist Olivia Podmore, 24, found dead at home Monday https://archive.fo/4yWuU
I should not have combined these. I'm slightly embarassed that I did so. Thank you