Martavis Bryant: I accept Ben Roethlisberger’s challenge

Steelers quarterback Ben Roethlisberger called out receiver Martavis Bryant this week, but anyone who worries that could create a rift between the two need not. In fact, Bryant said that when he heard Roethlisberger publicly call on him to “toughen up,” he appreciated what the Steelers’ veteran quarterback had to say. “I’m happy he issued…