The Pittsburgh Penguins will mandate neck protection for their AHL and ECHL teams while urging players at the NHL level will do the same, coach Mike Sullivan told reporters Tuesday.

The decision to mandate neck protection for farm teams comes days after the death of former Penguins forward Adam Johnson. He was playing for the Nottingham Panthers in England's Elite Ice Hockey League (EIHL) when his throat was cut by a skate blade during a collision in a Champions Cup game Saturday against the Sheffield Steelers.