| The Newman School | |
|---|---|
| Position | Power forward |
| Personal information | |
| Nationality | American |
| Listed height | 6 ft 9 in (2.06 m) |
| Listed weight | 205 lb (93 kg) |
| Career information | |
| High school | The Newman School (Boston, Massachusetts) |
| College | Michigan (signee) |
| Career highlights | |
Quinn Costello is an American high school basketball player who attends The Newman School. He is a four-star recruit signed to play college basketball for the Michigan Wolverines.
Costello attends The Newman School in Boston, and the Middlesex Magic on the Under Armour Association circuit. [1] During his senior year, he averaged 16.4 points and 8.1 rebounds per game midseason. [2] On November 15, 2025, he scored 17 points and 15 rebounds for his first double-double of the season. [3] On November 22, 2025, he scored a career-high 36 points at the National Prep Showcase. [4] [5]
On February 2, 2026 he was named to the 2026 McDonald's All-American Boys Game. He was Michigan's second McDonald's All-American in as many years, following Trey McKenney's selection in 2025, and the 25th overall in program history. [6]
On September 16, 2025, Costelllo committed to play college basketball for Michigan, over offers from Michigan State, Minnesota, North Carolina, Purdue and Texas. [7] [8] He was rated as the No. 1 player in the state of Massachusetts by 247Sports and ESPN. [9] [10] ESPN ranked Costello as a top 30 player overall in the nation. [11]