The NHL operates a seven-round off-season draft (217 picks). Like the NBA, the NHL uses a lottery system to determine which team gets the top pick. All 15 teams that failed to qualify for the playoffs take part in the weighted lottery with the winner moving up to select first overall. Any North American player aged 18–20, and any overseas player aged 18–21 is eligible to be selected. Players are generally chosen from junior hockey teams, high schools, the NCAA and overseas clubs.