Walker grew up in Port Washington, New York. He began his high school career at Long Island Lutheran High School. Dissatisfied with the lack of playing time there, he transferred to The Patrick School after his sophomore year. Walker averaged 9.7 points per game for the Celics as a junior.[1] As a senior, he averaged 11.9 points and 4.8 assists per game, leading the team to a 29–4 record and earning First Team All-State honors from NJHoops.com.[2] Walker posted a 31-point, seven-assist performance against Linden High School and helped The Patrick School win the Tournament of Champions.
At Seton Hall, Walker missed several weeks with torn ligaments in his hand as a freshman and averaged 1.8 points per game. Following the season, he transferred to Tulane.[4]
After sitting out a transfer season, Walker averaged eight points, 2.2 rebounds and two assists per game as a redshirt sophomore.[5] As a redshirt junior, he averaged 13 points, 4.3 assists and 1.7 steals per game.[6]
Following the 2020–21 season, Walker transferred to UAB.[7] On February 5, 2022, he scored a UAB program record 42 points in a 97–75 victory over Middle Tennessee State.[8] Walker was named Conference USA Player of the Year as well as Newcomer of the Year. He is the second UAB player to earn Conference USA Player of the Year honors, alongside Aaron Johnson, in 2011.[9] On April 11, 2022, Walker declared for the 2022 NBA draft, while maintaining his college eligibility.[10] On May 12, 2022, Walker withdrew his name from NBA draft consideration. He returned to UAB for the 2022–23 season.[11]
Professional career
Texas Legends (2023–2024)
After going undrafted in the 2023 NBA draft, Walker joined the Dallas Mavericks for the 2023 NBA Summer League. On August 14, 2023, he signed with the Mavericks,[12] but was waived on October 14.[13] On October 29, he joined the Texas Legends.[14] He averaged 20.0 points, 2.1 rebounds, 5.2 assists, 1.2 steals and scored 41.3% of his three-point shots.[15]
Walker earned the nickname "Jelly" after he joined the Jelly Fam collective,[17] a basketball movement founded by Isaiah Washington centered on finger roll layups.[18]