Can you name me one institution of higher learning (snort) with an NCAA sports program that did NOT have a vaxx mandate for athletes...?
Just one.
Quote from the JAMA study at your link (sed methods section):
“The present study was a survey (Supplement 2) of the experiences of the participating universities’ athletes with COVID-19 from March 1, 2020, through December 15, 2020, with focus on those who completed CMR imaging as part of their cardiac evaluation.”
The vaccines were not available yet when these athletes were tested.
You can save your snorting for something else.