Starting in 2016, college players were able to participate in the NBA combine but maintain NCAA eligibility so long as they withdrew withdraw from the draft within 10 days of the Combine’s conclusion (and did not sign an agent). Wisconsin’s Nigel Hayes smartly put his name in and had a dry run through the process before returning to the Badgers for his senior season.
Hayes will be participating in the NBA Combine this year as well, but no longer has the option to return to Madison.
As Bleacher Report notes, the NBA Combine assess physical composition (height, weight, body fat, hand size, wingspan, reach), athletic ability (jumping, bench press, quickness, sprints) and shooting ability.