The man known as the first to wear a bulldog costume as the mascot of Georgetown University sports teams was killed over the weekend in an automobile crash in New York, authorities said.

The New York Police Department said Patrick Sheehan, 54, of Larchmont, N.Y., was a passenger in a livery vehicle that was in a collision Saturday in the Bronx. The vehicle’s driver also was killed, the police said.

An article in Georgetown Magazine said that two live bulldogs represented the school for many years, but the second of them, known as Jack II, was replaced in1977 by Sheehan, in a bulldog suit.

Later, live dogs were returned to duty as mascots, but they have apparently shared the role with someone in a dog suit.

A university spokeswoman confirmed that the Patrick Sheehan killed Saturday was the first person to wear the mascot suit.

Information posted on an obituary web site said he graduated from Georgetown in 1981 and was a managing director in Wells Fargo Securities public finance department.