Kaylan King, 16, found out earlier this month, through the Make-A-Wish Foundation, that she was going to get the chance to hang out with 23-year-old Washington Nationals' slugger Bryce Harper.
A few weeks back she spent the afternoon in Nationals Park, talking with Harper, who gave her a tour of Nationals Park, played catch and took some swings in the batting cage with her.
"Best day ever. It's hard to recreate," Kaylan told reporters including MLB.com's Jamal Collier.
Harper seemed to enjoy the experience as well.
"Kaylan, she's a sweet spirit," Harper said, as quoted on MLB.com:
"I've never done anything like that. Doing something like that, it's a lot of fun. I'm very happy that I was able to do that and the whole team, the whole organization, they really took part in that. I can't thank them enough as well for letting her come in and do what she wanted to do."
Kaylan, who has battled a kidney condition since she was born, found out that she needed a transplant in 2015 and received it from her mother.
Her experience with Harper, which was organized by the Make-A-Wish-Foundation, was captured by cameras as part of ESPN's "My Wish" series and the segment will air tomorrow night at 6:00 PM EDT on SportsCenter.