John J. McMullen, Ph.D (May 10, 1918 – September 16, 2005) was an American naval architect, businessman, and marine engineer, and former owner of the New Jersey Devils and Houston Astros. He founded the engineering firm John J. McMullen & Associates, and was the owner of Norton Lilly International a shipping agent now based out of Mobile, Alabama, from 1972 until 2002.
John McMullen was born in 1918 in Jersey City, New Jersey. He graduated from the United States Naval Academy in 1940 and rose to the rank of commander during a 15-year naval career. The Naval Academy honored his naval and ice hockey backgrounds by naming their hockey team's rink after him. He received a master's degree in naval architecture and engineering from the Massachusetts Institute of Technology and a doctorate in mechanical engineering from the Swiss Federal Institute of Technology in Zürich. He married Jacqueline Everhart and had three children. He died at his Montclair, New Jersey home in September 2005.
He bought the Colorado Rockies and in 1982 moved the team to East Rutherford, New Jersey renaming them the New Jersey Devils. He instituted the Dr. John J. McMullen Award in 1984, presented annually to "an individual or individuals who have supported amateur hockey throughout the state". The team won two Stanley Cups during his ownership, in 1995 and 2000. Just before winning the second Cup, McMullen sold the team to YankeeNets. After his death, the team dedicated the 2005–06 season to him, wearing a small "JM" patch on their jerseys.