I was looking for something like this, but did not expect this many cases... Sorry if it has already been posted:

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/ Dembele, 29, Atletico Madrid striker collapses in training, requires medical attention https://www.youtube.com/watch?v=-R2_5LMobXc Alex Apolinario, 24, Brazilian soccer player dies after collapsing on pitch during match: https://www.cbssports.com/soccer/news/brazilian-soccer-player-alex-apolinario-dies-after-collapsing-on-pitch-during-match-in-portugal/ Britain's Jack Draper, 19, collapses at Miami Open: https://www.youtube.com/watch?v=VDuOP0V1nUw Mirko Kido, 36, Olympic gold medalist dies of heart attack during game: https://www.reuters.com/lifestyle/sports/indonesian-doubles-star-kido-dies-heart-attack-36-2021-06-14/ Ghanaian referee collapses during AFCON Match: https://www.youtube.com/watch?v=cvPQO44NzN4 Referee Bert Smith collapses on court due to blood clot during Gonzaga-USC men's Elite Eight game: https://www.espn.com/mens-college-basketball/story/_/id/31222546/referee-bert-smith-says-blood-clot-lung-caused-fall-ncaa-tourney Josh Downie, 24, cricketer dies after heart attack at practice: https://www.bbc.co.uk/news/uk-england-nottinghamshire-57058626 Giuseppe Perrino, 29, ex-Parma footballer dies at memorial match after collapsing https://www.thesun.co.uk/sport/football/15151824/giuseppe-perrino-dead-29-parma-brother/ Raymond van Barneveld collapses and receives paramedic attention during PDC Championship: https://www.dailystar.co.uk/sport/darts/pdc-players-championship-8-suspended-23759939 Devaraj Anchan, 33, volleyball player collapses during game, dies: https://www.thehindu.com/news/cities/Mangalore/volleyball-player-collapses-during-game-dies/article34185430.ece Garissone Innocent, 20, fell unconscious due to abnormal electrical impulse in heart during game: https://www.thesun.co.uk/sport/football/13901939/goalkeepers-rushed-hospital-collapsing/ Ethan Jovani Trejo, 16-year-old soccer player, collapsed on the field during training: https://eu.cincinnati.com/story/news/2021/06/25/teen-dies-after-medical-incident-princeton-high-school-field/5344293001/ Samuel Kalu, 24, Bordeaux star 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/ Cameron Dale, 29, Australian sailor 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, Ottawa footballer dies after 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, NHL Oilers goalie out for the season due to heart condition: https://ca.sports.yahoo.com/news/nhl-oilers-goalie-alex-stalock-miss-entire-season-with-heart-condition-covid-19-related-191817673.html Ceylin Alvarado, 23, pro cyclists out for season due to blood complications: https://www.nu.nl/sport-overig/6160296/veldrijdster-alvarado-voorlopig-niet-in-actie-door-verstoord-bloedbeeld.html Greg van Aevermat, 36, pro cyclist, loss of form since vaccine: https://www.indeleiderstrui.nl/wielrennen/van-avermaet-wijst-naar-vaccin-als-oorzaak-vormdip-op-deze-manier-heeft-wk-geen-zin/amp?__twitter_impression=true Three young Belgian cyclists suffer heart issues following race: https://rtv.be/artikels/jonge-kempense-wielrenners-krijgen-hartklachten-na-vaccinatie-a102612 Kamila Label-Farrel, 19, Uni Basketball Star died unexpectedly: https://www.baytoday.ca/obituaries/lebel-farrell-kamila-3884874 Jacob Downey, 19, Queens Uni Hockey player passes away after medical emergency: https://www.kawartha411.ca/2021/10/01/local-teen-queens-university-student-passed-away-suddenly-after-medical-emergency/ Christian Eriksen, 29, Collapses at Euros due to heart issue https://youtu.be/s0B03LSzXvo Josh Archibald, 28, Oilers hockey forward out indefinitely due to myocarditis: https://www.si.com/hockey/.amp/news/oilers-forward-josh-archibald-out-indefinitely-with-myocarditis Jen Gouveia, 38, suffered cardiac arrest during a run: https://toronto.ctvnews.ca/husband-of-toronto-mother-who-died-suddenly-on-run-says-he-lost-his-everything-1.5501767 Kyle Warner, pro BMX cyclist has pericarditis post vaccine: https://youtu.be/aebtcTi7EaA 16 year old youth suffered cardiac arrest after weightlifting: https://www.straitstimes.com/singapore/health/16-year-old-suffers-cardiac-arrest-following-strenuous-weightlifting-session-six Brandon Goodwin, 26, Atlanta Hawks star, career over due to blood clots: https://www.peachtreehoops.com/2021/10/3/22706769/former-atlanta-hawks-guard-brandon-goodwin-claims-covid-19-vaccine-ended-his-season Ewan Fraser, 30, Glasgow hockey player suffered cardiac arrest, passes away: https://www.thescottishsun.co.uk/news/7832060/glasgow-hockey-player-died-collapse-life/amp/?__twitter_impression=true David Jenkins, 31, Olympic silver medalist diver unexpectedly passes away: https://metro.co.uk/2021/10/12/david-jenkins-dead-at-31-tributes-pour-in-for-team-gb-olympic-diving-coach-15404658/amp/?__twitter_impression=true Paul Zisper, 27, Munich basketball pro, has emergency surgery after brain hemorrhage related to J and J: https://www.fr.de/sport/drama-um-zipser-90801217.html Filip Ingebrigsten, 28, Norwegian runner suffers loss of form post vaccine: https://norwaytoday.info/sport/filip-ingebrigtsen-is-back-in-training-after-experiencing-long-corona-vaccination-side-effects/ Avi Barot, 29, Saurashtra cricketer suffers cardiac arrest, passes away: https://www.thehindu.com/sport/cricket/young-saurashtra-cricket-player-avi-barot-dies-after-suffering-cardiac-arrest/article37015873.ece Abou Ali, 22, professional footballer collapses on pitch during game: https://www.thesun.co.uk/sport/football/16118079/footballer-wessam-abou-ali-awake-hospital-collapse/ Fabrice NSakala, 31, Besiktas defender collapses on pitch during game: https://www.theguardian.com/football/2021/aug/22/fabrice-nsakala-besiktas-collapse Jens De Smet, 27, footballer collapses on field, passes away of heart attack: https://newswep.com/jens-27-collapses-on-the-football-field-and-dies-this-is-not-maldegem/ Jente van Genechten, 25, footballer collapses on field due to heart attack: https://www.sudinfo.be/id411745/article/2021-08-18/25-ans-un-joueur-belge-de-football-fait-un-arret-cardiaque-sur-le-terrain-avant Frederic Lartillot, French footballer collapses in changing room, passes away due to heart attack after game: https://www.leprogres.fr/culture-loisirs/2021/09/11/deces-d-un-joueur-de-foot-apres-un-match-ses-coequipiers-ont-tout-tente-pour-le-sauver Benjamin Taft, 31, German footballer collapses after game, passes away due to heart attack: https://www.anpfiff.info/mobile/sites/cms/artikel.aspx?SK=2&Btr=96044&Rub=390 Rune Coghe, 18, Belgian footballer suffers cardiac arrest on pitch: https://www.sudinfo.be/id409738/article/2021-08-07/rune-jeune-joueur-de-18-ans-secroule-sur-le-terrain-du-rds-plus-le-temps-passe Helen Edwards, referee taken off court during World Cup qualifier due to heart issues: https://www.rtl.de/cms/dfb-spiel-unterbrochen-linienrichterin-vom-platz-getragen-4834888.html Dimitri Lienard, 33, FC Strasbourg midfielder collapses during game: https://madeinfoot.ouest-france.fr/infos/article-rc-strasbourg-dimitri-lienard-a-ete-victime-d-un-malaise-354221.html Sergio Aguero, 33, Barecelona star striker admitted to hospital for cardiac exam after match: https://www.cnn.com/2021/10/31/football/sergio-aguero-barcelona-chest-pain-spt-intl/index.html Emil Palsson, 28, Sognal midfielder collapses due to cardiac arrest during game: https://www.independent.co.uk/sport/football/norway-footballer-emil-palsson-cardiac-arrest-b1949583.html Antoine Méchin, 31, French triathlete suffers pulmonary embolism following Moderna: https://www.sudouest.fr/sport/course-pedestre/triathlon/le-triathlete-saintais-antoine-mechin-met-un-terme-a-sa-saison-et-ne-se-referait-pas-vacciner-si-c-etait-a-refaire-6234090.php Luis Ojeda, 20, Argentine football player unexpectedly passes away: https://www.antena3.com/noticias/deportes/futbol/emotiva-carta-lola-ortiz-muerte-novio-futbolista-luis-ojeda-soporto-idea-volver-ver-verte-nunca-mas_20210426608696616e5d5b0001eb20e9.html Greg Luyssen, 22, Belgian pro cyclist ends career due to heart issues: https://kw.be/sport/wielrennen/wielerbelofte-greg-luyssen-22-uit-de-panne-over-gedwongen-afscheid-door-hartprobleem-dat-akelig-gevoel-wil-ik-nooit-meer/ Pedro Obiang, 29, ex-West Ham star suffers myocarditis post vaccine: https://thecovidworld.com/pedro-obiang-29-year-old-professional-footballer-suffers-myocarditis-after-covid-19-vaccine/ Cienna Knowles, 19, equestrian star hospitalized due to blood clots: https://www.news.com.au/lifestyle/health/health-problems/teen-equestrian-star-cienna-knowles-hospitalised-with-blood-clots-after-pfizer-vaccine/news-story/286e7cd42e896b091e4b257322296a05