SOURCE: Good Sciencing (link)
A list of athletes who have died or experienced serious health events–usually for Sudden Cardiac Arrest and other heart-related issues–since the start of the vaccination effort.
Most reports do not mention Covid vaccination and the provided sources don't either, so it is unclear how Good Sciencing has verified that the listed events occurred "After COVID Shot".
In order to determine whether these events could be reasonably linked to the vaccine, you would need to establish that the current rate of SCA in athletes is higher than it was pre-pandemic, and if so, you would also need to show that it is associated with a Covid vaccination rather than infection.
Any perception of an increase can largely be explained by the Baader-Meinhof Phenomenon, also known as Frequency Illusion, as well as the fact that every new case is amplified by thousands of conspiracists who ignored similar cases pre-pandemic.
Sudden cardiac death in young people is not a new phenominon, and data suggests it is much more common than you might think. Background rates more than account for all listed reports.
A 2009 study (https://academic.oup.com/europace/article/11/10/1353/613010?login=true) showed that 12 "apparently fit and healthy" young people under 35 years old die in the UK every week from previously undiagnosed heart conditions.
In 2018, the heart charity Cardiac Risk in the Young (CRY) released the results of a study (https://www.c-r-y.org.uk/new-research-shows-sudden-cardiac-death-in-elite-footballers-is-higher-than-anticipated/) by the St George’s University of London that showed "cardiac conditions are still the leading cause of death in footballers"
A 4-year US study (https://bjsm.bmj.com/content/55/21/1196) completed in 2018 identified one US competitive athlete incident of SCA/D every 4.4 days (majority of which were fatal).
The CDC wrote in 2012, "On average, an estimated 66 athletes die suddenly of cardiac cause each year in the United States." (https://blogs.cdc.gov/genomics/2012/03/01/cardiac-death-of-the-young/)
A 2009 study looked at competitive athlete deaths between 1980 and 2006 and concluded that reports of competitive athlete sudden deaths was rising at a rate of 6% per year, with 76 deaths in each of the final 2 years of the study (2005 & 2006). (https://pubmed.ncbi.nlm.nih.gov/19221222/)
2016 study: "Sudden cardiac death is the most common medical cause of death in athletes, with an incidence of around 1 in 40,000 to 1 in 80,000 athletes per year according to the most recent estimates. (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4969030/)
2011 study: "The risk for sudden death in young athletes with cardiovascular disease is 2.5 times higher than that in non-athletes." (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3289188/)
617 footballers are listed in the FIFA Sudden Death Registry from 2014 to 2018 including 475 who died. (https://pubmed.ncbi.nlm.nih.gov/33361135/)
FactCheck.org "reviewed publicly available information for each of the 19 professional athletes in the list who either came from or played in the U.S."
In this group...
FIFA (the world's government body for soccer) said to Reuters: "FIFA is not aware of a rise in episodes of cardiac arrests as indicated in your email and no cases have been flagged in relation to individuals receiving a COVID vaccine." https://www.reuters.com/article/factcheck-coronavirus-sport-idUSL1N2SK160
Dr. Florian Egger leads a working group at Saarbrücken University that maintains the FIFA Register for Sudden Deaths and Cardiac Arrests (Fifa-Register für plötzliche Todesfälle und Herzstillstände), said to AFP (translated): "The claim that there is a dynamic in there cannot be derived from our data or other international registry studies. No more deaths among footballers than before the COVID-19 pandemic"
Prof Dr. Tim Meyer, chairman of the medical commission of the German Football Association (DFB) and team physician fo the German national football team since 2001, told AFP (translated): "From my point of view, the claim that deaths in sport or especially in football have increased after the introduction of the Covid-19 vaccinations has no substance. Corresponding evidence is not found or alleged evidence turns out to be false."
Matthew Martinez, a sports cardiologist who works with the National Football League, National Basketball Association, National Hockey League and Major League Soccer and who is the director of sports cardiology at Morristown Medical Center in New Jersey, said to Politifact: "To date, I am not aware of a single COVID vaccine-related cardiac complication in the professional sports." https://www.politifact.com/factchecks/2021/dec/01/blog-posting/theres-no-proof-covid-19-vaccines-are-causing-heal/
Jonathan Kim, an associate professor of medicine and chief of sports cardiology at Emory University in Atlanta said to Politifact: "I am not aware of any reports that vaccines in athletes are causing cardiac issues"
"Worldwide surge of sports people suffering sudden health issues and death"
This list is similar to the Good Sciencing list. The same response applies.
Video shows sports starts collapsing. https://twitter.com/kukicat7/status/1457721238793687048
Reuters was not able to find evidence that any incidents were related to vaccination.
Politifact found that several athletes shown in the video were not vaccinated. https://www.politifact.com/factchecks/2021/dec/01/blog-posting/theres-no-proof-covid-19-vaccines-are-causing-heal/
True, because 100% of participants were fully vaccinated!
"All runners must be able to show proof of COVID-19 vaccination in order to participate in NYRR races. For more information, visit our COVID-19 vaccination policy page."
https://www.nyrr.org/races/rbcbrooklynhalf ("Health and Safety" tab)
Calling this a "study" is a huge stretch. It's a comparison of two entirely different data sets. On one side you have a study based on a search of specific databases with specific criteria between 1966 and 2004 (see methods here: https://academic.oup.com/eurjpc/article/13/6/859/5932831?login=false ). And on the other side you have crowdsourced newspaper clippings (sourced from the Good Sciencing list).
To make a relevant comparison between the 1966-2004 study and today, you would need to perform the same searches in the same databases, and you would need to investigate to determine if reporting rates are likely to have changed. This still wouldn't get you to the point of blaming the vaccine, as it would be at least as probable that Covid-19 is responsible, or that there are other factors relating to the pandemic (such as a reduction in activity in 2020).