John Calipari may have to find a new way to build his Kentucky rosters in the coming seasons.

That will be the case if the NBA gets its way and lowers the draft age of prospects from 19 to 18, in essence, doing away with the one-and-done rule. According to Jeff Zillgitt of USA TODAY Sports, that’s what the NBA is proposing to the NBA Players Union.

The way the NBA draft rules are currently set up, prospects must be one year removed from high school before entering the draft. Prospects do not have to go to college, they can play overseas or sit the year out, but they cannot go straight from high school to the NBA. That has led to many elite prospects to show up in college for a few months before immediately leaving for the NBA, which makes somewhat of a mockery of the colleges they choose to attend.

However, even if this rule passes, it may not go into action until the 2022 NBA Draft. That’s when the collective bargaining agreement between the NBA and the Players Association would permit changes to the rules as well as give the NBA franchises time to prepare for the draft alteration.