Broncos “amped up” by Rob Gronkowski’s “low blows” crack

On one hand, all you can do is laugh at Rob Gronkowski’s Beavis and Butthead-level tweet yesterday. But it’s the playoffs, so you know someone’s going to twist his juvenile brand of humor into motivation. Gronkowski’s tweet regarding the Broncos which read “Heard their whole team is good at giving low blows,” would have been…