[2] He worked as a ball boy for San Ysidro High School head coach Terry Tucker, who said that "he couldn't keep (Williams) out of the gym.

"[3] In sixth grade while playing with the San Diego Sharks, Williams had his first official game dunk at 12 years old (April 15, 2017).

[1] In seventh and eighth grades, he was ranked the number one player in the 2023 class by the Naismith National Youth All-American Report.

[20] Sources: On November 5, 2022, Williams committed to play for the University of Memphis for head coach Penny Hardaway, starting in 2023–24.

However, he never joined the basketball team stemming from a criminal investigation in California, where Williams was facing gun charges for shooting at trespassers on his property.

On January 8, 2024, Mikey Williams and fellow Memphis Tigers freshman JJ Taylor both entered the NCAA transfer portal mid-season.

[3] On April 13, 2023, Williams was arrested in Jamul, California, on five charges of assault with a deadly weapon; he was released on $50,000 bail the following day.

[22][23] San Diego County Sheriff's Office's Lieutenant Gavin Lanning said Williams is likely to face only one charge, carrying a maximum sentence of up to four years in prison (minimum six months).

[29] As a result of the hearing, Judge Sherry M. Thompson-Taylor ordered Williams to stand trial on six felony gun charges and scheduled his arraignment for October 24, 2023.

[34] By the end of his freshman year of high school, he had almost 2 million followers on Instagram, including musician Drake and NBA players LeBron James and Kevin Durant.

On July 22, 2021, Williams signed a contract with Excel Sports Management to pursue Name, Image and Likeness endorsement opportunities.