New England Patriots tight end Rob Gronkowski grabs a pass during an NFL Football training camp scrimmage of the Patriots and Philadelphia Eagles in Foxborough, Mass., Tuesday, Aug. 12, 2014. (AP Photo/Charles Krupa)

Gronk promises he will play Sunday

Saying he is "super excited," Gronkowski vowed to be on the field after he didn't play in any of the four preseason games as he completed hi…