John McMonegal Park Jr., a Johns Hopkins Applied Physics Laboratory mathematician, died of heart disease Jan. 2 at Brighton Gardens of Columbia. He was 89 and lived in Columbia.
Born in Richmond, Ky., he was the son of John M. Park Sr., a farmer, and his wife, Mary Etta Cobb. He was raised on the family cattle farm, and was a graduate of Madison High School, where he was a baseball pitcher and football center. Mr. Park was a past president of the Kentucky Association of 4-H Clubs.
He earned a bachelor’s degree at Eastern Kentucky University and had a master’s degree from Indiana University. Mr. Park served in the Air Force.
He joined the Johns Hopkins Applied Physics...