Overview
- Costello announced his commitment on Sept. 16 after an official visit to Ann Arbor over the weekend.
- The 6-foot-10 Boston standout chose the Wolverines over finalists including Michigan State, Purdue and North Carolina.
- He is a four-star recruit ranked as high as No. 28 nationally by Rivals and rose to No. 38 in the 247Sports composite.
- Evaluators describe him as a stretch-four with size, touch and vertical athleticism, with UAA numbers of 11 points, 5 rebounds and 1 assist on 42% shooting, 34% from three, and 88% at the line.
- Costello becomes the second member of Michigan’s 2026 class alongside Spanish center Marcus Moller, reflecting continued recruiting momentum after last season’s Big Ten Tournament title and Sweet 16 run.