I'm a fan that can label and have an opinion on any one of the players of the team i root for.
You certainly can, but it's a little silly that you get that worked up over it.
I'm not the professional athlete here. He is.
Even as a professional athlete, he can have, and voice, his opinion on Bruce Irving's sack total on social media. The team has a PR staff, that I am sure monitors everything the players do on social media. If they thought it was a problem, they would have said something to him by now. Maybe they will one day, but until this point they have not. You obviously care more about what Junior Galette tweets than the team does.