J.J. Watt wipes out fan at concert, with a tackle that likely was staged

Mike Curtis approves this message. On Sunday night, a fan at a Zac Brown Band concert put his toes on the stage — and Texans defensive end J.J. Watt put his ass on the ground. Watt posted the video of the moment on his Twitter page with the message, “Nobody messes with @zacbrownband.” Was it staged?…