"It's so much fun, so much fun," Cooper said at minicamp. "We've had just a couple times where I've had to block him on defense — kind of a throwback to our college days when we were doing that."

Beyond the time shared spent in the building, Cooper said Ketner spent plenty of time at his local residence. Cooper noted that he hadn't put Ketner on babysitting duty for his just under one-year-old child ("I'm worried June will beat him up a little bit. I've held off not because I don't think he can handle it, but I'm worried for him," Cooper said), but that hasn't stopped Ketner from hanging around.

And given the unique nature of the situation, Cooper truly cherished being able to spend that time together.