Caleb Daniel was born with a congenital heart defect - hypoplastic left heart syndrome - which, according to his mother, essentially meant he only had half of a heart.
The condition meant plenty of time spent at Monroe Carell Jr. Children's Hospital at Vanderbilt for Caleb as a young boy and three open heart surgeries before most his age were ready for preschool. There were long days and trying moments, but the Daniels managed to keep their positivity through it all, and eventually, there was someone else to lean on.
Ashley doesn't recall the first time Rinne met her son, but the bond between the two seemed to come instantaneously, the star athlete drawn to the boy who still had a smile on his face despite all of the above.
"Caleb, he's a true warrior," Rinne said recently when coming across a photo of his friend.
Before long, Caleb was decked out in Predators memorabilia, including miniature goaltender equipment and plush doll made from Rinne's likeness. There was even a life-size cutout of Rinne that resided in Caleb's room, delivered by one of the nurses at the hospital who knew there was a relationship growing between the two.
As the Preds were making their run to the Stanley Cup Final in 2017, Caleb was back at Vanderbilt, waiting on a heart transplant.
And nothing gave Caleb, the youngest of five, and his family a reprieve quite like watching - and playing - hockey.
"We had decorated the room with a Predators theme, but the nurses and doctors and all the staff of the hospital would get fully on board with Caleb, watching the games on the TV and then on his iPad," Ashley said. "We would be cheering, and they'd be walking by the room to cheer along with him. It was so exciting, because they saw the joy that it brought this kid that's sitting in a bed. But to him there was nothing negative. It was all wonderful and exciting, and it was all about the way Pekka responded to this child. It was fantastic."
On Predators game days, the hallways outside of Caleb's room were figuratively transformed into a rink for the young boy to show off his skills, undoubtedly the most important thing on his mind.
"He'd be carrying around his IV pole with the medicine that was keeping his heart functioning and playing hockey up and down the halls," Ashley said. "A little girl that was in the room next to him would be standing at the door cheering for him. We would sing the national anthem, and everybody would have to stop and put their hand over their heart. It just became so much bigger than the game to him."
All the while, Caleb was still waiting for a call to come.
After the 2017 playoffs were complete, and a few days before the next season was set to begin, Rinne was back at the facility for one of his visits. Caleb, goalie gear and all, made his way down to Seacrest Studios inside the hospital to see his friend, a chance to reconnect after the offseason was complete with hockey on the horizon once more.
And then, just days after that visit, the phone rang.
A transplant followed, and after Caleb woke up from the long surgery and a difficult recovery, there was a video message from Rinne waiting for him. That was all Caleb needed to see for that smile to come right back.
"For a little guy, Pekka was just a best friend," Ashley said. "To the majority of people, he's this incredible athlete, but to Caleb, he was just a best friend."