"The National Hockey League is appalled that a video call arranged today by the New York Rangers to introduce their fans to one of the league's incoming stars, K'Andre Miller, was hacked with racist, cowardly taunts," the league said in a statement. "The person who committed this despicable act is in no way an NHL fan and is not welcome in the hockey community.
"No one deserves to be subjected to such ugly treatment and it will not be tolerated in our league. We join with the Rangers in condemning this disgusting behavior."
The Rangers disabled the chat as soon as possible and are investigating the matter, the club said in a statement.
The individual responsible repeatedly typed racial slurs into the message chat during the video call.
New York selected Miller with the 22nd overall pick in 2018. The 6-foot-3 defenseman signed an entry-level contract March 13 after two seasons at the University of Wisconsin.