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Illinois has been quite active in the amateur ranks over the past few weeks as the transfer portal buzz has slowly died down and coach Brad Underwood’s 2025-26 roster has been largely cemented.
In that time, the Illini have focused their efforts on guards, having offered numerous 2026 prospects, as well as a 2027 recruit. On Wednesday, Underwood and his crew turned their attention to the frontcourt, offering Quinn Costello – a 6-foot-10 power forward in the Class of 2026.
Excited to announce that I have received a Division 1 offer from The University of Illinois! I’m grateful to Coach Underwood, Coach Hamer, and the rest of the staff for this opportunity. Go Illini! pic.twitter.com/3hCQuUfP0Q
— Quinn Costello (@quinncostello3) June 4, 2025
Despite his size, Costello's go-to skill is exactly what you would expect from an Underwood target: shooting. Continuing to prioritize players with the ability to knock down shots from the perimeter, the Illini haven’t so much as sniffed a prospect without a crisp jumper in this cycle.
Costello has a smooth stroke and a high release that allows him to get his shot off in most scenarios and against nearly any defender at his position. A solid athlete, Costello is also active on the offensive glass and an excellent rim runner in transition.
A Boston native, Costello plays his high school ball at The Newman School alongside fellow Illinois target Lucas Morillo. As for AAU, Costello suits up for the Middlesex Magic – a program that competes on the Under Armour Circuit.
Tabbed as the 144th recruit in the country by 247 Sports, Costello has received the majority of his offers thus far from mid-major programs – but he has recently seen his stock rise. In just the past few days, after he picked up Pangos All-American co-MVP honors, Costello has also collected offers from Vanderbilt and Minnesota.
More From Illinois on Sports Illustrated:
Illinois Basketball Projected as Top-10 Team for 2025-26 by a Key Metric
Top Five Big Ten Returners for 2025-26: Braden Smith, Tomislav Ivisic and More
Ranking Illinois Basketball's Toughest Opponents for the 2025-26 Season
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