Following his junior season at Purdue, forward Trevion Williams announced Monday via social media that he would declare for the 2021 NBA Draft. He is eligible to be selected on July 29. 

Williams will not hire an agent and, as a result, will retain his college eligibility. If invited, he may take part in the NBA Combine from June 21 to June 27. Williams has until July 19 to either keep his name among those eligible to be selected or withdraw from the draft and return to the Boilermakers.