Playing in front of a host of college coaches in Los Angeles and in Hampton, Diallo averaged 13.2 points, 10.7 rebounds and shot just better than 50-percent from the field on 99 shot attempts in nine games.
"He's gotten better since the high school season," Centereach (N.Y.) Our Savior coach Eric Jaklitsch told Scout.com. "He just had a chance to show what he is doing and what he's capable of doing."
Diallo's most impressive game of the spring came against 2015 top three recruit Ivan Rabb. The 6-foot-10 big man went for 24 points and 17 rebounds and won the battle with Rabb.
Diallo plays a physical brand of ball. He hits the glass, contests shots, runs the floor and plays with energy on both ends of the floor.
"He's just got such a motor," Jaklitsch explained. "It's non-stop. That's the biggest thing with him. He has a non-stop motor. He just goes and goes and goes."
Offensively, Diallo showed improved as well. He's much more comfortable making moves on the block than he was even six months ago.
"He progressed and just got better as the season went on," Jaklitsch said about his offense. "He played really good in the Jordan international game. He's improved on his moves with countless reps. He's become more patient in the post."
With his improved play, the interest from college coaches has picked up.
"There was a huge interest for him beforehand, as far as the amount of schools that were calling about him," Jaklitsch said. "They saw him as your typical big guy that is long, athletic, rebounds and blocks shots."
"A lot of people that had offered before called me again to make sure he knew he had an offer," he added. "He got new offers too."
Diallo, Scout.com's No. 26 overall player in 2015, currently holds scholarship offers from Pittsburgh, Syracuse, St. John's, Arizona, Florida, Kansas, Louisville, Villanova, Connecticut, Iowa State, Providence, Miami, Oregon, Texas and UNLV.