A consensus five-star recruit and the number-one player in the 2021 class, he stands 7 ft 1 in (2.16 m) and plays the center and power forward positions.

He stood 6 ft 2 in (1.88 m) at the time and was teammates with current Orlando Magic guard Jalen Suggs, whom he would play alongside through high school.

[6] After the season, he had success with his Amateur Athletic Union team Grassroots Sizzle at the Under Armour Association, earning tournament most valuable player honors.

[10] On April 19, 2021, Holmgren announced his commitment and signed a National Letter of Intent to play college basketball for Gonzaga, following his former high school teammate Jalen Suggs.

[24] However, on August 25, it was announced that he would miss the entire 2022–23 NBA season due to a Lisfranc injury in his foot that occurred during a Pro-am game.

[27] On November 18, Holmgren put up a career-high 36 points along with 10 rebounds, five assists, two steals, two blocks, and two three-pointers in a 130–123 overtime win over the Golden State Warriors.

He also joined Michael Jordan as the only rookies in NBA history to put up at least 35 points, 10 rebounds, five assists, two steals, one block, and two three-pointers made in a game.

He averaged 11.9 points, 6.1 rebounds, 3.3 assists and 2.7 blocks per game, leading his team to a gold medal, and earned tournament MVP honors.

[33] Listed as a center, many observers note that the lanky Holmgren is a versatile player who moves, handles, shoots, and jumps fluidly and deftly, more like a guard than a big man.

[34] His vertical and running leaps are much stronger than average for a center or power forward, and his 7-foot-6-inch (2.29 m) wingspan contributes to his standout blocking and rebounding abilities.