NBA teams are increasingly losing games on purpose to improve their draft prospects and basketball must consider every possible remedy to stamp out deliberate “tanking,” the league’s chief said Saturday.

Speaking at his annual news conference before the NBA All-Star Game, commissioner Adam Silver warned that current punishments to prevent teams from gaming the system that allocates top new players are “not working.”

“Are we seeing behavior that is worse this year than we’ve seen in recent memory? Yes, is my view,” said Silver.