I think it's a pretty funny joke. Karinchak is certainly the craziest, most animated reliever in baseball right now. I saw the Tweet amongst the sea of Karinchak being "ready to run through a wall" after striking someone out, and the way he was shouting after striking out Altuve to a national audience.
If you thought it was talking about his vaccination status, that would have to assume that he's the only unvaccinated player in baseball--which isn't the case. It would be INCREDIBLY stupid to make that leap, but yet here we are.
But no worries. Whenever there's vague, unprescribed vitriol, I assume it's directed towards me.