Aaronson, who played for Union Berlin on a loan deal from Leeds United in the 2023-24 season, expressed his admiration for Sullivan, who is being touted as the planet's best 14-year-old talent.
“I haven’t seen him play because he’s so much younger than me, but I’ve heard about how much of a superstar he’s going to be,” Aaronson told The Inquirer. “It’s really great for U.S. soccer, and it’s great for the Philadelphia Union. To see a 14-year-old signing professionally is definitely something that we don’t see very often in America. I mean, they’re young nowadays, but not that young. So it’s amazing to see.
"I give him full credit because he seems like a confident kid. He seems like he believes in himself, and he’s not afraid to do things. And I respect that because that’s what you need at that age. I can see a lot of things about his game that will help in the future for sure.”