This is going to redpill a lot of normie stragglers. Derek Rhoads of Baseball Prospectus magazine reports that player injuries in the MLB are up 33% this year compared to the last full season of play (2019). The only thing that's obviously different about this season is that most players (about 85% according to MLB) got their covid jabs this spring. source: https://twitter.com/drhoa3/status/1400307497508896771
Now, fans are starting to see the connection: "Could Covid-19 Vaccinations Be Playing a Role in MLB's Current Wave of Injuries?" "Will there be legal and financial fallout from this spring's vaccination campaign? While the vaccine manufacturers themselves are shielded from liability over side effects in most cases, MLB and/or individual MLB clubs might be held responsible for failing to meet informed consent requirements. MLB.com writer Brian McTaggart reported on May 10 that Dr. Seema Shah of Houston Methodist played a major role in 'educating' the Astros players "on the pros and cons of the vaccine" and helped to "dispel some of the misinformation that might be out there." If it should turn out, however, that the team or its medical staff withheld essential information from players about potential Covid vaccine risks, players or their survivors could have grounds for legal action." source: https://www.crawfishboxes.com/2021/5/29/22459946/could-covid-19-vaccinations-be-playing-a-role-in-mlbs-current-wave-of
I do think that partly explains the rise in injuries this year -- but that factor alone should have increased injuries by 5% at most to this point in the season. MLB is only one-third of the way through its 162-game season, and I'd normally expect to see the factor you mention start to impact players more in the second half of the season. MLB held a shortened 60-game season in 2020, so players got some work in but not as much as they do normally.