Kraft went on NFL Network's "NFL Gameday Kickoff" ahead of Thursday night's clash and left the door open for the retired tight end to return to the organization at some point.
"We all love Gronk and I think the bottom line is he hasn't put his retirement papers in," Kraft said. "So we can always pray and hope. ... That's a good academic argument that there is hope for us still with Gronk."
In one interview, the Patriots tight end told NFL Network Insider Ian Rapoport in September that he'll know if he's ready to return if the passion to play bubbles up again.
"Just like I knew I needed to walk away from the game. I just felt it. Just felt like it was time," Gronkowski explained to Rapoport. "You just have that feeling inside. Just going with the heart, just going with the gut feeling, and that's how I'm going to be living my life too, with what my gut feeling is telling me. Throughout my life I've had gut feelings and then I didn't go with them. I went with a different option, and then it never works out. I swear it never does.
"You always want to go with what you're truly feeling, even if it doesn't make sense to someone else. If it makes sense to you then it makes sense to do that. If I get the gut feeling, that's what I would need. My soul would have to be on fire, and I wouldn't just listen to it for one day. It would have to be a consistent basis, too."
On FOX's pregame show before "Thursday Night Football," Gronkowski offered a similar sentiment when pressed by Terry Bradshaw.
"You know, I've answered this question many times before. I would have to be feeling it, feeling it big time to come back. It's always going to be open in my mind," Gronkowski said. "I love the game of football. I love playing the game. I love being around the game. I even love watching the game of football now. It makes just the appreciation to watch it, just seeing the hits, seeing the glory of it, you understand the game so much more and why fans are (fans) of the game so much more.
"So I'll always keep it open. I'll always keep it open. I'll always keep it open. I'll always keep the door open."
Gronk has not indicated he intends to return anytime soon, but Kraft's comments will only spur more speculation that a comeback is likely and inevitable.