Patriots tight end Rob Gronkowski visited the Barnes and Noble in the Prudential Center on Thursday with his father, Gordie, and his four brothers, to autograph copies of “Growing Up Gronk: A family’s story of raising champions.”

But before he faced the eager New England fans, he was pressed about the arrests of former Patriots tight end Aaron Hernandez and current cornerback Alfonzo Dennard.

“I’ve got no reaction at all,” Gronkowski said. “I have no reaction at all, I’m just here about the book.”

On June 26, Hernandez was charged with first-degree murder in the slaying of Odin Lloyd, and also charged with several gun violations. He was released by the Patriots shortly after.

On Thursday morning, Dennard was arrested on suspicion of driving under the influence in Nebraska, according to Lincoln police.

After he offered little about his teammates, Gronkowski was asked if he believed the NFL had an issue regarding players and their off-field activities and deferred to the commissioner.

“Ask Roger Goodell,” Gronkowski said. “You got to ask Roger. He’s been in the business for a while. Roger that.”