[4] Nathan Hale finished with a 29–0 record, won the Washington Interscholastic Activities Association Class 3A state title, and captured the No.

[8] He won his second straight Class 4A state championship and helped Garfield reach the quarterfinals at High School Nationals.

[9][10] For his junior season, Beauchamp transferred to Rainier Beach High School in Seattle, citing a lack of motivation in class and sickness from mold in his house during his time at Garfield.

After his freshman season, Beauchamp held offers from four NCAA Division I programs, including Washington.

[7] His success on the Amateur Athletic Union circuit helped him earn a five-star rating from recruiting websites before his junior season.

After over six months with the program, he returned to Washington due to the COVID-19 pandemic and began reconsidering his college options.

In his college debut on April 20, 2021, Beauchamp had nine points and nine rebounds in a 99–90 loss over Treasure Valley, and felt lingering respiratory limitations.

[31] On November 9, Beauchamp set a career high with 19 points scored, along with 8 rebounds grabbed, during a 136–132 win over the Oklahoma City Thunder.

[33] On 24 January 2024, playing for the Milwaukee Bucks's G-League affiliate team Wisconsin Herd, Beauchamp scored 36 points on 13-26 shooting from the field in a 107–120 win against the Birmingham Squadron, along with 5 rebounds and 3 assists.