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Scout Report
The rare combination of size, skill, and sheer athleticism makes a prospect special. When a power forward pushing 6-10 starts knocking down shots from deep and protecting the rim with intent, opposing coaches instantly recognize a problem. Quinn Costello isn't just a big body; he's a developing offensive weapon and a defensive anchor with a motor that refuses to quit, forcing you to adjust your entire game plan around him.
Background
Quinn Costello hails from Boston, Massachusetts, a city steeped in basketball tradition and known for producing tough, fundamentally sound players. Growing up in that competitive environment, he learned early that skill alone isn't enough; effort and grit are non-negotiable. His path led him to The Newman School, a well-regarded prep program where he's refined his game alongside other high-level talents like Lucas Morillo and Luka Kuqo, consistently challenging himself against top-tier competition. This immersion in a structured, competitive setting has accelerated his development, allowing him to consistently refine his impact on both ends of the court.
Playing Style
Costello’s game is built on versatility and an impressive physical profile for his age. Offensively, he operates effectively in multiple spots. He can stretch the floor, hitting three-pointers with a fluid, high release, making him a dangerous pick-and-pop option who forces opposing bigs to venture away from the rim. Inside, he possesses a developing low-post game, showing soft touch and an ability to finish through contact with either hand. His decision-making with the ball is solid; he doesn't force shots and displays good court vision for a big, capable of making a quick pass out of a double team or finding cutters from the high post. Defensively, he's a difference-maker. His length and timing make him a formidable rim protector, contesting shots without fouling. He moves his feet well for his size, allowing him to switch onto smaller players for short stretches, a crucial attribute in modern basketball. He runs the floor hard in transition, consistently beating opposing bigs down the court for easy buckets or to set up offensive rebounds, affecting the tempo of the game significantly.
Strengths
His ability to guard multiple positions is a significant asset; he can switch ball screens and stay in front of guards, showing lateral quickness uncommon for a player his size. On the offensive end, Costello’s developing outside shot makes him a pick-and-pop threat that opens up the paint for driving guards. He’s also an excellent rebounder on both ends, possessing great instincts for positioning and a strong desire to track down loose balls. His high activity level translates into consistent effort on defense and on the glass, providing energy and extra possessions. The timing he displays on shot contests around the basket disrupts opposing offenses and leads to frequent deflections or blocks.
Areas to Watch
For Costello to reach his full potential, adding functional strength will be key. This would allow him to hold his ground more consistently in the post against stronger college bigs and finish through heavier contact. While his shooting mechanics are good, improving his consistency from beyond the arc will unlock another dimension to his offensive game, making him truly unguardable in certain matchups. Continuing to refine his post-up moves and developing a wider array of counter moves will also make him a more polished and dangerous scorer when operating with his back to the basket.
Player Comparison
Costello's game reminds me of a younger, more mobile Bobby Portis, particularly with his combination of interior scoring, rebounding, and the ability to step out and hit the three. Like Portis, he has a strong motor and a developing offensive game that allows him to be effective both inside and out. He might not have Portis's same consistent physicality early in his career, but his defensive upside and shot-blocking instincts are arguably ahead of where Portis was at the same stage, offering a similar versatile big man who impacts the game across the board.
Recruitment
With 28 Division 1 offers from major programs like Purdue, Michigan State, Florida State, and Illinois, Costello was one of the most sought-after bigs in the 2026 class. He ultimately committed to Michigan, a decision that speaks volumes about his fit within their system and the Wolverines' vision for his development. This early commitment gives him the freedom to focus purely on refining his game without the distraction of ongoing recruitment. He'll join a program where his blend of size, skill, and defensive versatility will be a foundational piece, likely impacting the lineup sooner rather than later in Ann Arbor.
Projection
At the collegiate level, Quinn Costello projects as an immediate impact player, likely developing into a multi-year starter for Michigan. His combination of size, shooting touch, and defensive ability will make him a tough matchup for Big Ten opponents. There's a clear path for him to become a versatile modern big, capable of stretching the floor, protecting the rim, and contributing significantly on the glass. If his offensive game continues to expand, particularly his strength and consistency from deep, he possesses the tools to be a potential NBA draft pick, filling a valuable role as a stretch-four with defensive chops.
Updated Jul 29, 2026 · Analysis by PrepRadar Scouting Team
Career Journey
Michigan
COLLEGE
The Newman School
PREP SCHOOL
Expressions Elite
AAU
Career Highlights
Quinn Costello named McDonald's All-American
Offers
28
Michigan
Committed
Chose Michigan over 27 other offers
Purdue
Minnesota
Michigan State
Boston College
Florida StateOffers sourced from 247Sports and social media monitoring.
Social Activity
In a New York vs Boston preseason matchup, we saw LuHi narrowly take down The Newman School which was a hotly contested at The Preview 🫣 The game featured Michigan commit Quinn Costello and top-ranked PG Jamaal McKnight 🌟 @Eleve11Hoops @quinncostello3 @jamaalmcknight3 https://t.co/4EHHwPNrOd
4⭐️ Michigan commit Quinn Costello is one of the fastest rising recruits in the country 👀 @quinncostello3 https://t.co/1IBoiXklGh
Magic 17u UAA finish ranked #14 in the 🇺🇸! A 28-6 record (16-4 UAA) led to a top 25 ranking from THE CIRCUIT for the 5th straight year! In 4 years the Magic are 62-15 17u UAA play! Excited for another BIG year in 2026! #MagicFamily #MagicDNA #UAA #TheCircuit #UnderArmour https://t.co/BLc0BWMk2v
Signed. Sealed. Built for the Maize & Blue Quinn Costello. Joseph Hartman. Marcus Moller. Malachi Brown. The next generation is here. #GoBlue | https://t.co/ZFzW97bBNu https://t.co/cKGbgWhpyI