Voss scouted the minor leagues for potential NHL officials and under his watch, the number of on-ice officials increased from 10 to 23.

In 1929, Denneny retired to become an NHL on-ice official.

Starting in 1994, however, NHL officials wear numbers on their shirts, a procedure adopted by other leagues.

NHL officials immediately validated the selection, but weeks later Imlach admitted that Tsujimoto was a fabrication.

In addition, NHL officials had new uniforms, which debuted at the 2009 All-Star Game.

The suspension is always subject to a review by NHL officials, and it was deemed not to have warranted a suspension.

He became the first rookie to earn 100 penalty minutes and 100 points in the same season, which magnified his reputation for complaining to NHL officials.

NHL on-ice officials changed to orange-coloured uniforms in March 1953.

In 1984, he became the first NHL on-ice official to wear a helmet.

Prior to the 1994-95 season, NHL officials' uniform shirts displayed their last names on the back.