On Sunday, the hometown star ended his recruitment by telling the Cardinals he was staying home to play his college ball.
"I just felt like it was time," Spalding said. "I had been meaning to do it. I wanted to do it last week but I also wanted to sit down with my mom and discuss it a little more.
"So, I felt like this was time."
The 6-foot-10 Spalding picked U of L over Xavier, Indiana, Tennessee, Duke and several others. He's ranked as the No. 66 player in the Class of 2015 by Scout.com.
"It's very cool for me to stay home," he said. "There are so many good things about it. I just felt like I wanted to stay here.
"It's great for my mom because she will be able to see all of my games. Growing up, she's always had to work a lot. So, it will be good for her to be able to come see me all the time."
Spalding said while the Cardinals just recently offered him a scholarship, the staff has been recruiting him for several years. Former assistant coach Kevin Keatts started recruiting him after his freshman season at Trinity.
"I've talked to all of the coaches and coach Pitino a lot," he said. "I just felt like they really wanted me. (Pitino is) not only a great coach but so impressive in the recruiting. I can't wait to play for him."
Pitino and his three assistant coaches have tracked him the past two weeks with The Ville AAU team, which will play in Louisville this week.
And Spalding said that will be a "fun start" to his continuing his hometown career.
"It's just a blessing for me," he said. "It's pretty big for me to get this out of the way and focus on my senior year. It just feels great and is a dream come true."
Spalding is the second commitment in the '15 class for the Cardinals after Bradenton (Fla.) Victory Rock wing Deng Adel committed last week.