Apparently, there are people out here taking shots at Gronk for faulty grammar in his social media postings. Now why would you do that? Can't you just troll Rodney Harrison instead? Anyway, Gronk has a message for all of the amateur English teachers trying to hold him down.
Loose translation: I might not be able to spell, but I can beat you without mercy if necessary. Deal with that.
Don't ever change, ya big lug. The there, their, they're distinction is overrated anyway.