Getty Philadelphia Eagles wide receiver A.J. Brown and New England Patriots cornerback Christian Gonzalez. If you know anything about how the NFL preseason works, then you know that when teams come together for joint practices, it’s always a marked occasion simply for the fact that we all know these dudes are about to throw down. For some reason — not that anyone is complaining — the grind of working out and playing football at the hottest time of the year can lead to some pretty incredible on-