Porter never played for the Condors, instead joining the NBA's Chicago Bulls in 1971. He played seven seasons in the NBA as a member of the Bulls, New York Knicks, Detroit Pistons,and New Jersey Nets. His finest professional season occurred in 1976-77, when he averaged 13.2 points and 5.9 rebounds for the Pistons.  During his time playing for the Pistons, he was nicknamed "Geezer" for his slow, deliberate stye of play and his long beard. He became a fan favorite at the Pistons then-home, Cobo Arena.
Howard Porter, who was employed as a county probation officer, disappeared on May 18, 2007. He was found severely beaten in a Minneapolis, Minnesota alley in the early morning hours of May 19 and died on May 26 of injuries sustained during the assault.
Local police arrested a 33-year-old woman named Tanya Washington in connection with the murder. Washington was later released by police, stating that there was not enough evidence to file charges against her. On September 4, police announced that they had arrested and charged Rashad Arthur Raleigh with Porter's murder. Raleigh is now serving a life sentence for the crime.